Re: Check for doubleposts

On Tue, May 3, 2005 9:48 am, Fredrik Arild Takle said: > what is the easiest way to check if a person i registered twice in a > mysql-table. Lets assume that I only check if the last name is in the > table > more than once. This is in mysql 4.0 (subquery not an option). > > Do I have to use arrays and in_array. Or is there a more elegant solution? If the GROUP BY and HAVING solution doesn't thrill you (and I thought it was quite nice and elegant) you could go with Ye Olde Standard Answer: select * from user_table as a, user_table as b where a.lastname = b.lastname and a.user_id != b.user_id You can use a.user_id < b.user_id to see only the one duplication. -- Like Music? http://l-i-e.com/artists.htm