"Yann GAUTHERON" <[EMAIL PROTECTED]> wrote:
> ID_LOGIN is an integer
>
> Can anyone say me if this :
>
> WHERE index1=ID_LOGIN OR index2=ID_LOGIN
>
> must be slower than those 2 queries :
>
> WHERE index1=ID_LOGIN
> WHERE index2=ID_LOGIN
>
> for a 20 000 rows table ?
You can rewrite the first query with UNION or with TEMPORARY tables:
http://www.mysql.com/doc/en/Searching_on_two_keys.html
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