savi176 at 19h06
06
Aug
2009
How to create transactions SCD2 from many SCD tables
Hello,
During the design of a HR data mart I had a problem that was repeated in every dimension:
All the dimensions are SCD type 2 and their sources are few operational tables that each table has a history records.
For example:
Dim Employee is built from T_phone, T_address, and 8 more tables in the same structure. . This is an exaple
EMP_KEY PHONE_NUMBER FROM DATE TO_DATE
1 111 01/01/20
Hello,
During the design of a HR data mart I had a problem that was repeated in every dimension:
All the dimensions are SCD type 2 and their sources are few operational tables that each table has a history records.
For example:
Dim Employee is built from T_phone, T_address, and 8 more tables in the same structure. . This is an exaple
EMP_KEY PHONE_NUMBER FROM DATE TO_DATE
1 111 01/01/20
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So, the DW DB is loaded with data of various SCD types.
The data is in live use.
New requirements arise that require new SCD 2 fields to be added.
Backups exist of the source systems.
Are there any design tips, experiences that anyone can share on
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06/08/2009 at 19h06 by "savi176"






