* David Katz > I am trying to do a select statement where I am using one of the > aliases in the where clause. I keep getting an error that the field > does not exist.
>From the manual: "Note that standard SQL doesn't allow you to refer to an alias in a WHERE clause. This is because when the WHERE code is executed the column value may not yet be determined." <URL: http://www.mysql.com/doc/en/Problems_with_alias.html > > example: > > Select invno, invdate, invamt, left(invdate,2) as month from > salesfile where > month = '01' > > MySql keeps telling me that month is not a field. Is there a way to do > this? Yes, simply repeat the expression: Select invno, invdate, invamt, left(invdate,2) as month from salesfile where left(invdate,2) = '01' -- Roger -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
