>Thanks a lot for your help, your script seems logically but execution time is almost the same
>
>Total execution time: 0:01:59 (hh:mm:ss) Script execution finished.
>
>I debug and the execution of the procedure is not one time, now it is executed 19593 times

OK, let's try brute force:

SELECT a.date, a.id
FROM PR_GET_SOLD(2013,1) x
LEFT JOIN mytable1 a ON x.numb = p.numb
WHERE a.year = 2013
UNION
SELECT a.date, a.id
FROM mytable1 a
WHERE a.year = 2013
AND a.month = 1

Providing a.id is unique, this should get the right result (UNION, as opposed to UNION ALL only returns unique rows) and it should not take two minutes!

Sorry for not knowing of a more elegant solution, I use stored procedures far too rarely.

Set