Re: ** SQL WHERE clause order

Wolfgang,
  I think you understand by now : I want a certain predicate evaluated first because it has a program variable :select_sen_emp_chk_first and I want it checked before going to the check dept or salary since that will need a table access. Thank You.

Wolfgang Breitling <breitliw_at_centrexcc.com> wrote: Why do you want a certain predicate evaluated first?

At 02:34 PM 11/4/2003, you wrote:
>Hi,
> In a SQL statement I want a certain where clause to be done first. Is
> it enough to list it first as follows or do I (and can I) do something
> else to make it get checked first before other WHERE/AND clause are
> looked at. Thanks :
>
>SELECT emp_id FROM emp
>WHERE select_sen_emp_chk_first = 'Y'
>AND dept = :dept
>AND salary > :min_sal

Wolfgang Breitling
Oracle7, 8, 8i, 9i OCP DBA
Centrex Consulting Corporation
http://www.centrexcc.com

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