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  2. RPG400-L
  3. July 2007

Re: SQL Opinion (still experimenting with SQL)

<snip>
Which do you think should perform better or do you see where I could
improve? This is going into a web app and similar statements will also
be
processed. Statement 1 uses a join to bring in the records needed, while
the other uses the EXISTS statement.
</snip>

Use Operations Navigator and use Visual Explain to run each statement
and see how it processes them. You might find they both process the same
way. SQL can take an EXISTS and change it to a join so you might have
the same processing going on either way.



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