Best way to implement date ranges in schemas (fact 1 valid "fr...

SCD type 2 - Valid To Date Value? 12/31/9999 or Null?

Hello all, While populating Effective End Date (Valid to date) for current record, is it better to put a largest possible end date value of 12/31/9999, or is it better to insert a null value. One advantage of inserting 12/31/9999 as end date is that

DATE OR DATE KEYS IN FACT TABLES

I've read different opinions about the usage of dates in fact tables. If a date is NEVER used to filter and only reported, what is the purpose of adding it as a date key instead of a plain date type? Aren't we wasting the resources to get to the date

Updating Periodic Snapshot Fact Tables

What are the best practices for maintaining periodic snapshot fact tables if the atomic data that created them is modified? We have a couple periodic snapshot tables that capture new inventory and new revenue at the end of every month. Sometimes the

Loading Data Aggregated to Date into Fact Table

I have following source table: Source Table ID App_Version Os_Version Date 9123305 2.5.2.60 Windows NT 5.1 2/15/2009 9123306 2.5.2.60 Windows NT 5.1 2/15/2009 9123307 2.5.2.60 Windows NT

Architecture questions : implement historical data view without SCD?

Hello ! I need some fresh points of view of an architecture Ive just encountered. This solution was designed by a consulting firm specialized in the HR IT field. The DWH in this case is supposed to handle 100000 employees for an organization of

Fact table with multiple date ?

Hi, I am modling a fact table for prisoners inscription in order to track historical changes. An admission is the hole stay comprise of one or many inscriptions usually separated by transferts between institutions. In the transactionnal system, it

Combination of SCD2, partial snowflake, Effective and end dates in fact table

We are creating dataware housing for multitanant based systems for HR module. Requirement ?Able to report on historical data for any given data time. Active employees headcount till given date. (as of that day) Onhire and termination based on perticula

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Best way to implement date ranges in schemas (fact 1 valid "from" date1 "to" date 2)