----- Original Message ----- From: "Mike Morton" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, December 01, 2004 2:47 PM Subject: If statement in a where query....
> I am trying to find a list of people based on renewal dates, the logic of > the query would be: > > Select everything from the db where the last renewal date is between a and > b, or if there is no last renewal date then where the signup date is between > a and b > > The query that I have is something like: > > Select * > from db > where last_renewal_date > between '2004-11-01' and '2004-11-30' or > if( > length(last_renewal_date) < 1, > signup_date between '2004-11-01' and '2004-11-30' > ) > order by last_renewal_date > > Obviously the syntax is wrong here, but is there a way to accomplish this > logic using an if statement in the where statement? > You don't need an 'if' to do what you want. Using 'and' and 'or' and brackets around your conditions should be enough. Something like this should do the trick: Select * from db where last_renewal_date between '2004-11-01' and '2004-11-30' or (length(last_renewal_date) < 1 and signup_date between '2004-11-01' and '2004-11-30') order by last_renewal_date That will ensure that the rows which are selected either have their last renewal date in Nov 2004 -OR- that it is less than a year since their last renewal and they signed up in Nov 2004. Rhino -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
