MySQL — Update if exists else insert with two keys

Question

I have a table with fields foreign_key_id | value1 | value2, and I want to update value2 if I have a match for foreign_key_id and value1.

If foreign_key_id or value

Answer 1

Try this slight modification if you cannot get p.campbell's solution to work

IF EXISTS(SELECT 1 FROM Mytable WHERE foreign_key_id = f1 AND value1 = v1) THEN
    UPDATE Mytable SET value2 = v2
    WHERE foreign_key_id = f1 AND value1 = v1;
ELSE
    INSERT INTO Mytable(foreign_key_id,value1,value2)
    VALUES (f1,v1,v2);
END IF;