Information générale
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Titre:
Index and SQL statement pattern related to speed
I have a general question that appears to have the answer of "keep the SELECT WHERE statement in the same pattern as your index." Any comments on the validity of this statement. Please comment.
Example:
If my index on a table is A + B
(two chacter based fields to keep things simple) and I then have
SELECT statement with WHERE B = vp_B AND A = vp_A
will this run at the same speed as the same as
SELECT statement but with WHERE A = vp_A AND B = vp_B
Thanks
Jon
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