Just a related comment. When using ETL tools (e.g. Informatica, Ab Initio, Teradata, Talend, etc), the best practice is to do your joins, computations in those tools because you get the benefit of massively parallel processing.

The exception would be if you have a parallel database engine like Netezza.

In reply to Re^2: Parllel Processing Database Query by metaperl
in thread Parllel Processing Database Query by krish1982

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