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ETL testing
How can we do the ETL testing on Data WareHouse?


  
Total Answers and Comments: 2 Last Update: September 10, 2009     Asked by: Deepthy123 
  
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March 08, 2009 21:21:14   #1  
ThisisRaj Member Since: March 2009   Contribution: 1    

RE: ETL testing

You can do that by comparing the source vs warehouse tables in SQL Server you can use like this

source.table1
except
warehouse.table1
Union
Warehouse.table
except
source.table1


Why do you do the above union is you are taking source table as the base table and compare with warehouse then take the warehouse as source and compare that with source table then you get the differences.


 
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September 10, 2009 08:18:22   #2  
anita_09 Member Since: August 2009   Contribution: 1    

RE: ETL testing

ETL testing validates that data is transformed correctly from OLTP to data
warehouse.


Validating the data transformed includes following main verification points:



  1. Ensures that all expected data is loaded. Comparing record counts between
    source data data loaded to the warehouse and rejected records.

  2. Ensures that all data is transformed correctly according to design
    specifications.

  3. Ensures that the ETL application substitutes default values ignores
    invalid data.

  4. Validate correct processing of ETL-generated fields such as surrogate
    keys.

  5. Validate that data types in the warehouse are as specified in the design
    and/or the data model.

  6. Validate the referential integrity between tables.


 
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How can we do the ETL testing on Data WareHouse? 
Latest Answer : ETL testing validates that data is transformed correctly from OLTP to data warehouse. Validating the data transformed includes following main verification points: Ensures that all expected data is loaded. Comparing record counts between ...


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