for example: SELECT COUNT(*) as numfound FROM mytable WHERE mycondition;
in this query, mytable and mycondition are variable and on run time, they are changed. I use this query to jump to the last page of a grid form. sometimes the query may have more than million records and I want to give a warning to the user to specify a condition to limit the number of records. I would like to count the records upto 10000 (for example) and if the records are more than this, stop counting and ask user to change the condition. to solve this problem I did something like this: SELECT one_field FROM mytable WHERE mycondition LIMIT 10001; if the number of records of this query is equal to 10001, then I show the warning message. but this query is not as fast of COUNT query. is there any way to limit the first query? thanks ----- Original Message ----- From: "gerald_clark" <[EMAIL PROTECTED]> To: "Mojtaba Faridzad" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Tuesday, July 22, 2003 9:15 AM Subject: Re: how to limit COUNT(*) > Perhaps you could post some examples of what you have tried. > I don't understand what you are asking. > > Mojtaba Faridzad wrote: > > >Hi, > > > >I guess there is no way to limit COUNT(*). Is that right? We cannot use the > >result of COUNT in WHERE condition or LIMIT doesn't help. In this case so > >far I have retrieved a field and used LIMIT. Is there a better way to > >control it? > > > >Thanks > > > > > > > > > > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
