MySQL Update If Exist Else Insert Procedure

Are you tired of checking data in your code before inserting? Well MySQL procedures are here to the rescue. This simple procedure shows how you can do that:

CREATE PROCEDURE   ` update_insert_user ` (  IN  uid2 int  )
 BEGIN
 DECLARE  last_login2 DATETIME;
 SELECT   ` last_login ` INTO  last_login2  FROM   `  user  ` WHERE   ` uid `   =  uid2  LIMIT   1 ;
 IF  last_login2  IS NULL THEN
 INSERT INTO   `  user  `  ( ` uid ` , ` last_login ` )  values  (uid2, now());
 ELSE
 UPDATE   `  user  ` SET   ` last_login `   =  now()  WHERE   ` uid `   =  uid2  LIMIT   1 ;
 END IF ;
 END

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