Problem with the query

Sep 15 2009 4:58 AM

I am using sqlserver 2000.When i run a query for the first time..it is executing in particular time like 12 sec and when i am executing the same query the next time,it is executing in more or the less time like 4 sec,14sec. If the time varies like this, my application doesn't work well. Can you give any solution for this problem?