http://forum.kimballgroup.com/feed/? Latest topics Thu, 11 Mar 2010 08:14:22 GMT 10 http://kimballgroup.com/images/KGlogoBasic.gif http://forum.kimballgroup.com/feed/? http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/booking-number-and-description-in-the-fact-table-t405.htm bustaliz Hi there, we have a fact table that stores the items of a costplan of a project. Each item has a booking number and a description. If we would have a booking dimensions, the dimension would have as many rows as the fact table. My question is, whether we should build this mentioned dimension or should we add two attributes to the fact table -> booking_nr and booking_nr_description? Actually this is a degenerate dimenion, but I'm not sure because of the description field. Thanks Dimensional Modeling and Data Architecture Tue, 19 Jan 2010 13:04:43 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/booking-number-and-description-in-the-fact-table-t405.htm#1653 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/booking-number-and-description-in-the-fact-table-t405.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/dealing-with-duplicate-dimension-rows-t457.htm fred_mumble A recent acquisition has added complexity to the Customer dimension and associated fact tables at the company I work for. The root of the problem is that we now have around 20 sources of customer and associated sales facts. We have data quality processes in place such as cleansing, standardization, matching and merging. The problem is that given the number of sources, volume of data and that we can only block data from going into the warehouse for 24 hours, duplicate Customer dimension rows ... Dimensional Modeling and Data Architecture Mon, 08 Mar 2010 16:21:31 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/dealing-with-duplicate-dimension-rows-t457.htm#1836 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/dealing-with-duplicate-dimension-rows-t457.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/how-to-handle-multiple-many-to-many-dimensions-in-a-single-star-schema-t461.htm DataAwareHouse Hello Everyone, This is my first post here. I'm looking for an answer to the following question: The bridge table technique can be used to model many-to-many dimensions. This probably makes queries a bit less efficient than when the dimension table is directly linked to the fact table. If there are only one or two such many-to-many dimensions, may be the resulting lower performance is acceptable. I'm wondering what if there are quite a few such dimensions (about a dozen). Further what ... Dimensional Modeling and Data Architecture Thu, 11 Mar 2010 08:14:22 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/how-to-handle-multiple-many-to-many-dimensions-in-a-single-star-schema-t461.htm#1854 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/how-to-handle-multiple-many-to-many-dimensions-in-a-single-star-schema-t461.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/start-schema-vs-snow-flake-schema-t460.htm indy In my organisation we are on a way to implement data warehouse and data mart for sale. we have one dimension City/District/Store. 1. Store name can be split/merge from one district to other in next quarter. 2. there is possibility of changing City name e.g. london to east london, west london. issue : My team have two different opinion to design this dimension. 1st view is to create three separate table join them CITY->District ->Store and another view is to create a single dimension ... Dimensional Modeling and Data Architecture Wed, 10 Mar 2010 09:57:22 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/start-schema-vs-snow-flake-schema-t460.htm#1846 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/start-schema-vs-snow-flake-schema-t460.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/fct-clarification-t440.htm vermarajiv Hi all, For an insurance company, I am trying to come up with the dimensional model for claims. A claim has attributes like Date of Loss Date Reported Status Date Cause of loss Authority Contacted Claimant Reported by..... etc I can see that claim has some attributes that can go in fact(factless) table and others in claim dimension. But if I do that there is 1:1 relationship between these two and I cannot see a reason why I should separate them into two tables. How do you guys ... Dimensional Modeling and Data Architecture Tue, 16 Feb 2010 01:33:07 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/fct-clarification-t440.htm#1767 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/fct-clarification-t440.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/bridge-table-for-insurance-t444.htm premasiuc HI, I am creating the Property & casualty Insurance DW for Autopolicy I have PolicyTransactionFact, DIM_covered_item_vehicle, Policyholder_dim these are FK's in the fact table. and I created driver dimension table which has driver details. How do I get 1) the number of Active drivers on the policy. 2) how many vehicles are associated for each driver or viceversa. 1)Shall I go with the option Bridge table between policyholder and driver or 2) Shall I go with option Bridge ... Dimensional Modeling and Data Architecture Thu, 18 Feb 2010 21:31:30 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/bridge-table-for-insurance-t444.htm#1799 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/bridge-table-for-insurance-t444.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/modelling-heterogeneous-product-table-t454.htm dcow My Modelling of products has led me to a Heterogeneous Product situation such that if have 10 Product , we have 11 Product dimensions: 1 simplified dimension describing all the productsand 10 extended dimensions describing the custom products. The design is something like below CoreProduct Dimension ProductKEY IDENTITY INT ProductType ..Common Attributes ProductTypeA Dimension ProductKey FK ..specific Attributes ProductTypeB Dimension ProductKey FK .. Custom ... Dimensional Modeling and Data Architecture Fri, 05 Mar 2010 10:29:24 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/modelling-heterogeneous-product-table-t454.htm#1828 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/modelling-heterogeneous-product-table-t454.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/free-form-text-in-transaction-table-t459.htm vermarajiv
Thanks]]> Dimensional Modeling and Data Architecture Tue, 09 Mar 2010 16:49:36 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/free-form-text-in-transaction-table-t459.htm#1841 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/free-form-text-in-transaction-table-t459.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/logical-dimensional-model-t456.htm BoxesAndLines Is there such a thing as a logical dimensional model? If you agree, how is it different than your physical dimensional model? Dimensional Modeling and Data Architecture Mon, 08 Mar 2010 14:00:05 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/logical-dimensional-model-t456.htm#1835 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/logical-dimensional-model-t456.htm http://forum.kimballgroup.com/business-requirements-and-program-project-management-f4/time-frame-estimate-t458.htm BiConsultant I am new BI learner and currently studying kimball datawarehouse toolkit. I have question, How can i estimate a time frame and estimate in terms of working hours for Data Warehouse project. I know we have to go through whole Business dimensional lifecycle. Is there any rough formula? For example: If we are developing a datamart for Sales, they have lets say 120 tables in thier sales schema in thier OLTP database. How can i prepare estimate $ and time line for each step in the project? Business Requirements and Program / Project Management Mon, 08 Mar 2010 19:32:06 GMT http://forum.kimballgroup.com/business-requirements-and-program-project-management-f4/time-frame-estimate-t458.htm#1837 http://forum.kimballgroup.com/business-requirements-and-program-project-management-f4/time-frame-estimate-t458.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/fact-table-for-comparing-survey-responses-with-relative-weight-t455.htm equipoBI Hi everyone, This is my first post on this forum, I'm glad I've found it and I hope someone could help me. Our problem is that we dont know how to design a fact table to store responses from a survey in order to compare then later. For example, we need to know how many people answered "Yes" to Question q1 and q2, how many answered "Yes" to q1 and "No" to q2 and so on. Each person answers to a survey wich has a relative weight, so its not just a simple count ... Dimensional Modeling and Data Architecture Mon, 08 Mar 2010 09:50:12 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/fact-table-for-comparing-survey-responses-with-relative-weight-t455.htm#1834 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/fact-table-for-comparing-survey-responses-with-relative-weight-t455.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/fact-table-grain-at-a-sub-atomic-level-t453.htm seadog2010 I'm thumbing through the Design Tips and would love to find some thought given to the statement made in The Data Warehouse Toolkit: The Complete Guide to Dimensional Modeling (pg 34): "Preferably you should develop dimensional models for the most atomic information captured by a business process. Atomic data is the most detailed information collected; such data cannot be subdivided further." I'm now supporting fact tables that all have a grain that is not at the atomic, but sub-atomic ... Dimensional Modeling and Data Architecture Thu, 04 Mar 2010 22:24:31 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/fact-table-grain-at-a-sub-atomic-level-t453.htm#1826 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/fact-table-grain-at-a-sub-atomic-level-t453.htm http://forum.kimballgroup.com/etl-and-data-quality-f9/transfer-data-to-database-t452.htm gtmikwen
I have been looking for a data integration technology.
We have been searching and have had some advice. But we have not found the right software yet.

We are needing the ability to migrate contacts and data on a daily basis. The transfer will be made manually. Maybe someone could help me?

Thanks for the help!]]> ETL and Data Quality Thu, 04 Mar 2010 16:34:50 GMT http://forum.kimballgroup.com/etl-and-data-quality-f9/transfer-data-to-database-t452.htm#1822 http://forum.kimballgroup.com/etl-and-data-quality-f9/transfer-data-to-database-t452.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/order-header-fact-and-multiple-payment-methods-t451.htm AKris I need some help in designing this particular situation. Here are some details: 1)The grain is one row per order 2)Each order can have multiple payment methods ex: cash,credit card,customer account,due bill,gift card 3)A combination of payments is possible. ex: credit card and gift card,multiple credit cards,multiple cash payments (ex: for an order with $100 value,3 or more cash payments can be made $10,$30,$20,$40) and each cash payment will be associated with a cash transaction num(that ... Dimensional Modeling and Data Architecture Thu, 04 Mar 2010 03:24:02 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/order-header-fact-and-multiple-payment-methods-t451.htm#1820 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/order-header-fact-and-multiple-payment-methods-t451.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/pivoting-data-on-the-fly-using-oracle-11g-pivot-clause-t450.htm kminboston Hi All - I am hoping some folks here can give sound experience advise from those having working experience with Oracle PIVOT clause introduced in 11g. Below, I am describing a scenario to see if feasible to use PIVOT for these requirements. Requirements: 1. # of resulting columns in PIVOT are determined at query execution time; The data represents survey responses (stored as rows) which need to be pivoted to present each response in its own column. The number of responses to a particular ... Dimensional Modeling and Data Architecture Wed, 03 Mar 2010 16:41:35 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/pivoting-data-on-the-fly-using-oracle-11g-pivot-clause-t450.htm#1818 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/pivoting-data-on-the-fly-using-oracle-11g-pivot-clause-t450.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/star-schema-designing-t449.htm vinodh Hi , Iam new one to datawarehousing.How to design the star schema. we have the hr module(OLTP) which has 77 tables. I have some basic doubts please anyone clear that. http://en.wikipedia.org/wiki/Star_schema For ex. I followed the above link. Whether OLTP table and dimension table are same or not. If not,can we create the dimension tables from OLTP tables? Fact_sales table has date_id,stroe_id,product_id and units_sold. date_id refers dim_date. store_id refers dim_Store. product_id ... Dimensional Modeling and Data Architecture Tue, 02 Mar 2010 09:23:08 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/star-schema-designing-t449.htm#1817 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/star-schema-designing-t449.htm http://forum.kimballgroup.com/technical-architecture-and-related-technologies-f5/need-help-with-terminology-t448.htm Arvind Hello all, I have tried to depict my current dw schema in the image below. As you can see the transaction table, summary tables are all part of the same physical schema. The transaction table has all the transactions since inception and has all the details of the individual transactions that are captured from the source system. The transactions are summarized and loaded into the fact_monthly_summary table at the end of every month. This is a monthly snapshot of all the transactions. We also ... Technical Architecture and Related Technologies Sat, 27 Feb 2010 13:58:26 GMT http://forum.kimballgroup.com/technical-architecture-and-related-technologies-f5/need-help-with-terminology-t448.htm#1812 http://forum.kimballgroup.com/technical-architecture-and-related-technologies-f5/need-help-with-terminology-t448.htm http://forum.kimballgroup.com/etl-and-data-quality-f9/extracting-data-when-there-is-no-timestamp-in-the-source-system-t446.htm DWH
Thanks]]> ETL and Data Quality Sat, 20 Feb 2010 15:00:42 GMT http://forum.kimballgroup.com/etl-and-data-quality-f9/extracting-data-when-there-is-no-timestamp-in-the-source-system-t446.htm#1803 http://forum.kimballgroup.com/etl-and-data-quality-f9/extracting-data-when-there-is-no-timestamp-in-the-source-system-t446.htm http://forum.kimballgroup.com/etl-and-data-quality-f9/initial-stage-tables-from-multiple-sources-t447.htm AaronLS I was somewhat confused while reading this: The DWH ETL Toolkit, On page 116, Chapter 4, Cleaning and Conforming, Assumptions, in the first bullet "...customer information from various sources initially can be staged in a table [. . .] whose configuration is the same regardless of the data source. Such a structure could be used for incoming data from various data sources deposited and queued for ETL work." If I understand this correctly, what is being described is a scenario where ... ETL and Data Quality Wed, 24 Feb 2010 23:06:26 GMT http://forum.kimballgroup.com/etl-and-data-quality-f9/initial-stage-tables-from-multiple-sources-t447.htm#1804 http://forum.kimballgroup.com/etl-and-data-quality-f9/initial-stage-tables-from-multiple-sources-t447.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/primary-key-of-fact-table-t39.htm kurtv
Thanks,
Kurt V]]> Dimensional Modeling and Data Architecture Tue, 17 Feb 2009 21:57:06 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/primary-key-of-fact-table-t39.htm#161 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/primary-key-of-fact-table-t39.htm http://forum.kimballgroup.com/etl-and-data-quality-f9/audit-dimension-for-a-dimension-t445.htm kskistad The books describe how to create a useful audit dimension for the fact table rows, but what about the dimension table rows? Why isn't that mentioned in the books? Isn't the data quality and lineage also important for dimensions? Would you create a Audit dimension outrigger with a foreign key in the associated dimension table? Would this be the same Audit dimension as the fact table audit dimension, so all data is in one table? Or would you simply add audit fields to each of your dimension ... ETL and Data Quality Thu, 18 Feb 2010 23:04:15 GMT http://forum.kimballgroup.com/etl-and-data-quality-f9/audit-dimension-for-a-dimension-t445.htm#1800 http://forum.kimballgroup.com/etl-and-data-quality-f9/audit-dimension-for-a-dimension-t445.htm http://forum.kimballgroup.com/etl-and-data-quality-f9/mdm-software-and-open-source-t443.htm gtmikwen
Thanks again for all of your support on the forum.
Already interested in different open source offers for data quality, we would be interested in a similar field.

We are thinking about Master Data Management software to complete our existing software. Would you know of open source MDM software?

Thanks for your help.]]> ETL and Data Quality Thu, 18 Feb 2010 14:30:39 GMT http://forum.kimballgroup.com/etl-and-data-quality-f9/mdm-software-and-open-source-t443.htm#1795 http://forum.kimballgroup.com/etl-and-data-quality-f9/mdm-software-and-open-source-t443.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/scd-type-2-dimension-and-fact-table-being-the-same-table-t430.htm emonchen I am designing a dimensional model for employee data in a data warehouse. Right now I only register the basic information about the employee, like job title, department, language, FTE, etc. I have chosen to use an SCD Type 2 dimension since I want to keep historical data. In the end, I need to be able to answer the following questions: - How many employees did I have at > ? - How many FTE did I have at > ? - What was my inflow in >> ? - Who changed from which to which department between ... Dimensional Modeling and Data Architecture Thu, 11 Feb 2010 11:14:43 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/scd-type-2-dimension-and-fact-table-being-the-same-table-t430.htm#1747 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/scd-type-2-dimension-and-fact-table-being-the-same-table-t430.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/what-to-do-when-the-weighting-factor-of-a-bridge-table-no-longer-seems-relevant-t441.htm pzajkowski I have a fact table that has healthcare claims data. Since a given claim can have multiple diagnoses, I'll use a bridge table that links a bridgekey from the fact table to the bridge table. The bridge table will also have a diagnosiskey that ultimately links to DimDiagnosis. This scenario is often cited in Kimball's books, BI bloggers, etc... In order to ensure a dollar amount associated with a given claim is aggregated correctly when a bridge table is in play, the bridge table has a weighting ... Dimensional Modeling and Data Architecture Tue, 16 Feb 2010 20:34:22 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/what-to-do-when-the-weighting-factor-of-a-bridge-table-no-longer-seems-relevant-t441.htm#1770 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/what-to-do-when-the-weighting-factor-of-a-bridge-table-no-longer-seems-relevant-t441.htm http://forum.kimballgroup.com/etl-and-data-quality-f9/fact-dimension-reload-design-t431.htm surfinwind Hello fellow DW/BI practitioners! I am in process of designing ETL for an enterprise-wide DW. One of the ideal functionality is to have a parameter driven capability to re-load historical fact transactions along with dimensions. What ETL metadata needs to be present within facts/dimensions in order to design an automated process for such re-loads? ... assuming dimensions are standard type 2. Here is what my thoughts are: Both dimension/facts need to have columns for source system effective ... ETL and Data Quality Thu, 11 Feb 2010 16:38:54 GMT http://forum.kimballgroup.com/etl-and-data-quality-f9/fact-dimension-reload-design-t431.htm#1749 http://forum.kimballgroup.com/etl-and-data-quality-f9/fact-dimension-reload-design-t431.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/non-chronological-loads-and-scd-type-2-t439.htm manimal Does the notion of loading a data mart in a non-chronological fashion conflict with supporting SCD Type 2? Dimensional Modeling and Data Architecture Mon, 15 Feb 2010 18:38:45 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/non-chronological-loads-and-scd-type-2-t439.htm#1765 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/non-chronological-loads-and-scd-type-2-t439.htm http://forum.kimballgroup.com/resource-requests-f10/what-is-a-data-warehouse-t391.htm melina386 What is a Data Warehouse? A data warehouse is a relational database that is designed for query and analysis rather than for transaction processing. It usually contains historical data derived from transaction data, but it can include data from other sources. It separates analysis workload from transaction workload and enables an organization to consolidate data from several sources. In addition to a relational database, a data warehouse environment includes an extraction, transportation, ... Resource Requests Tue, 05 Jan 2010 20:04:35 GMT http://forum.kimballgroup.com/resource-requests-f10/what-is-a-data-warehouse-t391.htm#1607 http://forum.kimballgroup.com/resource-requests-f10/what-is-a-data-warehouse-t391.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/1-to-many-relationship-t442.htm Jeff Smith I work for a health related insurance company. A member can belong to multiple Groups. A member can have only 1 primary care provider. I am creating a fact table to be used to tell Groups the Frequency at which their members are seeing their provider for maintenance visits regarding their illness. I want to use the same data to tell Providers the Frequency of their patients are coming for maintenance visits. I figure I have 2 choices: 1) Create a fact table with Member, Group, and Primary ... Dimensional Modeling and Data Architecture Wed, 17 Feb 2010 19:22:49 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/1-to-many-relationship-t442.htm#1787 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/1-to-many-relationship-t442.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/dimension-or-factless-fact-t423.htm robo Hi, I am new at the business of DW archirecture. Our goal is to design a data mart that deals with the document processsing in our organization. We have about 5,000,000 documents. Each document has a header table (with fields like document type, status, creation date, author etc) and document body depending on the document type (each document type has its own body table). Most of the fields in header and body tables are code values but some caontain text (subject, short description etc). There ... Dimensional Modeling and Data Architecture Sun, 07 Feb 2010 10:01:41 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/dimension-or-factless-fact-t423.htm#1728 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/dimension-or-factless-fact-t423.htm http://forum.kimballgroup.com/business-requirements-and-program-project-management-f4/bus-matrix-in-sap-suite-t392.htm kpsota
Thanks,
kpsota]]> Business Requirements and Program / Project Management Tue, 05 Jan 2010 20:04:39 GMT http://forum.kimballgroup.com/business-requirements-and-program-project-management-f4/bus-matrix-in-sap-suite-t392.htm#1608 http://forum.kimballgroup.com/business-requirements-and-program-project-management-f4/bus-matrix-in-sap-suite-t392.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/bus-matrix-business-process-to-source-system-not-11-t429.htm kskistad
So, do we list three separate Business Processes on the Bus Matrix for each of these systems, or just one, because they all do the same thing- collect applications?]]> Dimensional Modeling and Data Architecture Wed, 10 Feb 2010 20:36:25 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/bus-matrix-business-process-to-source-system-not-11-t429.htm#1740 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/bus-matrix-business-process-to-source-system-not-11-t429.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/compound-key-attributes-t437.htm Aikibart Hi all I am struggling with following design issue: in our organization, a number of attributes (such as account executive, flagship store) are defined by the combination of customer and brand, where brand is a rollup of a product. Our sales fact table is at customer and product level. How do I model this? My thinking is to have a dimensional table d_customers_by_brand with primary key customer_surrogatekey and brand_surrogatekey. Joining to the fact table would mean joining the fact table ... Dimensional Modeling and Data Architecture Mon, 15 Feb 2010 08:45:07 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/compound-key-attributes-t437.htm#1761 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/compound-key-attributes-t437.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/textual-values-in-dimension-tables-t432.htm emonchen With much interest I am reading "The Data Warehouse Toolkit", and I stumble upon a design thing that I have done differently in my Data Warehouse design (this is described in the book on page 42). It describes about the dimension table that it can contain a lot of columns with the text values of any categorization, in the books' example the product category, brand and department. In my Data Warehouse, I have created extra tables with a referential integrity so I have the description ... Dimensional Modeling and Data Architecture Thu, 11 Feb 2010 19:25:08 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/textual-values-in-dimension-tables-t432.htm#1751 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/textual-values-in-dimension-tables-t432.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/does-a-scd-type-1-change-response-always-update-all-historical-records-t185.htm JoeSalvatore Often when implementing slowly changing dimensions, a particular dimension will have only certain columns that are interesting to view changes over time (Type 2) while the remainder simply need to be updated (Type 1). Given this combination of Type 2 and Type 1 change responses how does one handle historical records? More simply put, anytime a Type 1 change is made, even one that occurs simultaneously with any other SCD Type, are all historical rows updated or is only the current row updated? Change ... Dimensional Modeling and Data Architecture Fri, 19 Jun 2009 18:21:08 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/does-a-scd-type-1-change-response-always-update-all-historical-records-t185.htm#836 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/does-a-scd-type-1-change-response-always-update-all-historical-records-t185.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/what-to-do-when-a-single-attribute-rolls-up-to-multiple-categories-t438.htm pzajkowski I'm working with healthcare claims data, and developing a new data warehouse. A single pharmacy claim line will have a drug identifier called a NDC (national drug code). A single NDC may belong to one or more drug categories. Given the one-to-many relationship of NDC to drug category, what would be the recommended way to build a drug dimension? Would it be advisable to stamp the drug category in the fact table along with the NDC_key such that a drug category dimension exists as well as the ... Dimensional Modeling and Data Architecture Mon, 15 Feb 2010 18:05:32 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/what-to-do-when-a-single-attribute-rolls-up-to-multiple-categories-t438.htm#1764 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/what-to-do-when-a-single-attribute-rolls-up-to-multiple-categories-t438.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/scd-type-1-and-2-t433.htm rcb4561 Would it be wise to design all SCDs with 2 surrogate keys? Let's take a customer dimension for example. There would be one SK to identify the customer and another SK to identify the type 2 records for a customer. Then we would use both keys on all fact tables. This provides the ability to report on facts using the historical or current values for the customer dimension. This approach seams more flexible. The disadvantages are increased columns and indexing on the facts, and separate objects ... Dimensional Modeling and Data Architecture Thu, 11 Feb 2010 19:34:55 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/scd-type-1-and-2-t433.htm#1752 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/scd-type-1-and-2-t433.htm http://forum.kimballgroup.com/technical-architecture-and-related-technologies-f5/sql-server-2008-date-data-type-as-dimension-key-t436.htm VHF
Anyone have first-hand experience with the new SQL 2008 Date data type? Have you bumped into any tools that don't support it properly?]]> Technical Architecture and Related Technologies Fri, 12 Feb 2010 19:42:33 GMT http://forum.kimballgroup.com/technical-architecture-and-related-technologies-f5/sql-server-2008-date-data-type-as-dimension-key-t436.htm#1758 http://forum.kimballgroup.com/technical-architecture-and-related-technologies-f5/sql-server-2008-date-data-type-as-dimension-key-t436.htm http://forum.kimballgroup.com/resource-requests-f10/looking-for-people-who-will-be-present-at-dwh-lifecycle-in-white-plains-ny-t434.htm iovalles I'm planning to attend this course on April. As someone new in the BI/DWH world, I would like to make contact with experienced people on this field to learn from their experiences and reduce pitfalls. Hope someone who can speak spanish could be around (I'm from Dominican Rep.)

We are in the Maritime transportation biz so my goal right now is to obtain the management sponsorship to start running our DW project.

Thanks,
Irving]]> Resource Requests Thu, 11 Feb 2010 19:48:09 GMT http://forum.kimballgroup.com/resource-requests-f10/looking-for-people-who-will-be-present-at-dwh-lifecycle-in-white-plains-ny-t434.htm#1753 http://forum.kimballgroup.com/resource-requests-f10/looking-for-people-who-will-be-present-at-dwh-lifecycle-in-white-plains-ny-t434.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/how-do-you-handle-weighting-when-you-have-multiple-mulitvalued-dimensions-t428.htm pzajkowski I've been reading The Data Warehouse Toolkit (2 ed.) and I can't seem to find a section that discusses how to handle weighting when more than one multivalued dimension is included in the design. I work with healthcare claims; we're in the process of developing a new data mart to replace our current mash of data tables. Chapter 13 of the DW Toolkit focuses on healthcare. It is suggested to develop a bridge table for multiple diagnoses with a weighting factor tucked in with a diagnosis group ... Dimensional Modeling and Data Architecture Wed, 10 Feb 2010 17:47:14 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/how-do-you-handle-weighting-when-you-have-multiple-mulitvalued-dimensions-t428.htm#1736 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/how-do-you-handle-weighting-when-you-have-multiple-mulitvalued-dimensions-t428.htm http://forum.kimballgroup.com/etl-and-data-quality-f9/real-time-data-aggregation-t425.htm asridhar7 i would like get some inputs, best practices around populating Periodic aggregation and Accumulated Aggregation tables from Real Time Data Source (PowerExchange) ETL and Data Quality Tue, 09 Feb 2010 16:01:33 GMT http://forum.kimballgroup.com/etl-and-data-quality-f9/real-time-data-aggregation-t425.htm#1732 http://forum.kimballgroup.com/etl-and-data-quality-f9/real-time-data-aggregation-t425.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/joining-factless-fact-tables-t426.htm sculley I am new to BI/Warehousing but have been asked to develop a better reporting system for our software. I am designing a warehouse and seem to have a lot of factless fact tables. There are also many situations where these "fact" tables should be joined together. One instance is Appointments with Episodes. I have appointments set up as a fact table with about 12 dimensions and have an Episode fact with about 15 dimension. Neither of these tables have any true "facts" other ... Dimensional Modeling and Data Architecture Wed, 10 Feb 2010 15:12:09 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/joining-factless-fact-tables-t426.htm#1734 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/joining-factless-fact-tables-t426.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/multivalue-attributes-t427.htm dkolls I am working on a model for use by the fund raising unit of our university. They want to be able to do some CRM type reporting on our alumni / donor data. In creating a constituent dimension I have found that there are a large number of attributes that are multivalued. A constituent can have zero, one or more degrees, one or more category codes, zero, one or more exclusion codes, zero, one or more (in some cases hundreds) of activity codes and so on. I have read what I can find on multivalued ... Dimensional Modeling and Data Architecture Wed, 10 Feb 2010 17:38:54 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/multivalue-attributes-t427.htm#1735 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/multivalue-attributes-t427.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/model-available-time-per-day-in-timesheet-data-warehouse-fact-or-dimension-or-neither-t75.htm heilet Hi I am new to data warehousing and related subjects and as a first project I am busy analyzing our timesheet data. I would like some design ideas for the following problem: I need to compare each consultant’s weekly (and monthly and annual) utilization, i.e. time logged compared to available time. The data warehouse consists of one fact table (FactActivityLog) and 5 related dimension tables, the most important one for this problem being DimDate. In all similar examples that I have found ... Dimensional Modeling and Data Architecture Mon, 16 Mar 2009 14:53:43 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/model-available-time-per-day-in-timesheet-data-warehouse-fact-or-dimension-or-neither-t75.htm#357 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/model-available-time-per-day-in-timesheet-data-warehouse-fact-or-dimension-or-neither-t75.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/preserving-prior-history-for-late-arriving-dimensions-t424.htm Bisquite Can't find much about this topic anywhere else so hopefully someone can help me. Our warehouse has late arriving dimensions for an Employee. Their department changes, for example, can be backdated in the systems and so we have to account for this and adjust the effective dates in the SCD and the relevant surrogate keys in the affected sales fact table. This is covered nicely in the "Data Warehouse Toolkit" under Health Care, so that bit's fine. Now what I need to do is allow ... Dimensional Modeling and Data Architecture Sun, 07 Feb 2010 15:44:33 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/preserving-prior-history-for-late-arriving-dimensions-t424.htm#1729 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/preserving-prior-history-for-late-arriving-dimensions-t424.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/model-policies-and-coverages-t416.htm vermarajiv Hi all, Need your help in modeling this. I am in insurance company. It has customers and customers can have more than one policies. Every policies have multiple versions because of renewals or some other change. Every version has 4 or 5 or more coverages with premiums. I can see that Customers and Policy will be dimensions and fctPolicyVersion could be a fact table. Will you keep a separate fact table for coverages and relate it to fctPolicyVersion ? Can two facts be related like this ? Thanks ... Dimensional Modeling and Data Architecture Fri, 29 Jan 2010 02:12:18 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/model-policies-and-coverages-t416.htm#1710 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/model-policies-and-coverages-t416.htm http://forum.kimballgroup.com/etl-and-data-quality-f9/etl-architecture-t422.htm tropically Hi My company is currently planning on building a datawarehouse. We are an oracle shop and are considering the approach for data migration from client servers to the datamart. Thoughts we have 1) Asynchronous CDC . I believe oracle now is replacing this with Golden Gate. 2) Export / Import 3) Db Links 4) Oracle data pump. (Similar to export / import) Questions Anyone have any other option. Not sure if ETL tools are used for this. My thoughts have been that the ETL tools are used ... ETL and Data Quality Fri, 05 Feb 2010 16:04:39 GMT http://forum.kimballgroup.com/etl-and-data-quality-f9/etl-architecture-t422.htm#1723 http://forum.kimballgroup.com/etl-and-data-quality-f9/etl-architecture-t422.htm http://forum.kimballgroup.com/etl-and-data-quality-f9/quality-of-our-data-and-datawarehouse-t420.htm gtmikwen
Thanks for helping us on our last question.
We have looked at different open source offers for data integration. And we are now looking for data quality software able to complete the data integration software.

Are there any packages able to suit our needs? Different or same software makers are fine for us.

Thank you.]]> ETL and Data Quality Wed, 03 Feb 2010 15:25:19 GMT http://forum.kimballgroup.com/etl-and-data-quality-f9/quality-of-our-data-and-datawarehouse-t420.htm#1718 http://forum.kimballgroup.com/etl-and-data-quality-f9/quality-of-our-data-and-datawarehouse-t420.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/sales-forecast-movements-t419.htm kyllonnoc First time forum poster, I've read The Data Warehouse Toolkit (very informative) but I'm struggling to conceptualise one of my companies analytic requirements. We have a sales forecast report that lists which orders are forecasted to drop in a particular time frame. One of the requirements for the data warehouse is to store this information on a month by month/quarter by quarter basis and highlight the movements that occur. For example, in January, Order A was forecasted to drop in June but ... Dimensional Modeling and Data Architecture Tue, 02 Feb 2010 20:56:19 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/sales-forecast-movements-t419.htm#1715 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/sales-forecast-movements-t419.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/accumulating-snapshot-t421.htm RajiRavi I would like to design a dimension model for an organization's training data. The main report would be to generate transcript for the employee, which will include what he/she has taken including what he should take during his/her employment period. This report should also, track any changes in the employee information such as his promotion to supervisor etc. Will an accumulating snapshot fact with a SCD employeed dimension help in this kind of reporting. Should the SCD key be updated in the ... Dimensional Modeling and Data Architecture Wed, 03 Feb 2010 16:24:38 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/accumulating-snapshot-t421.htm#1719 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/accumulating-snapshot-t421.htm http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/daily-snapshots-best-practices-t247.htm DilMustafa
Above mentioned approach is making these fact tables grow like crazy. I was wondering what are the best practices to handle a scenerio like this.]]> Dimensional Modeling and Data Architecture Fri, 07 Aug 2009 20:40:53 GMT http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/daily-snapshots-best-practices-t247.htm#1043 http://forum.kimballgroup.com/dimensional-modeling-and-data-architecture-f6/daily-snapshots-best-practices-t247.htm