create a mysql record if it doesnt exist, else update it

Question

I would like to modify this MySQL query to insert the row only if it does not exist. Otherwise, I would like to update the existing row.

Answer 1

Yes, use the INSERT INTO ... ON DUPLICATE KEY UPDATE syntax.

http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html

You will need to have a key defined on the table of types UNIQUE or PRIMARY KEY.