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                    How you capture changes in data if the source system does not have option of storing date/time field in source table from where you need to extract the data?The DW database can be Oracle or Teradata. The requirement here is to pull data from source system and ETL need to device a mechanism to identify the changes or new records. The source system can be a legacy system like AS400 application or Mainframe application. List out all such methods of data capture. The ETL can be Informatica, data stage or custom etl code. 
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                    Delete Child Record transformationsIf i delete one record in master table, then the same record is also deleted in dependent table, for this which transformation can we use. 
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                    ETL TransformationsWhen can we use stored procedure transformations. 
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                    Cognos vs Informaticacan anybody tell me that what are the processes used by cognos and Informatica for ETL Extraction, Scrubbing and Fusion. If you have any detailed report then please send me onmy mail ID...nm_105@yahoo.co.inthanks in Advance... 
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                    User Defined Environment VariablesWhat is the use of the User defined Environment variables? 
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                    Unconnected lookupWhat is the use of unconnected lookup transformation and exaplain with example? 
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                    Assignment TaskWhy we use assignment task in Informatica and what happens after we used it? 
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                    Sql server scenarioHow to get the below output for following table ? can you please clarify this 
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 100 | null | null | null
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                    Generate Negative SequenceHow to generate a negative sequence by using sequence generator? 
ETL Interview Questions

 
  
  
  
		
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