Question

mysql> SELECT Ext, Pass, Name, Context FROM temp_Users WHERE temp_Users.Pass NOT IN (SELECT Pass FROM Users);
+------+-------+---------+------------+
| Ext  | Pass  | Name    | Context    |
+------+-------+---------+------------+
| 6003 | Hello | WebPone | DLPN_Admin |
+------+-------+---------+------------+
1 row in set (0.00 sec)


mysql> UPDATE Users
    -> SET (Pass, Name, Context) = (SELECT  Pass, Name, Context FROM temp_Users WHERE temp_Users.Pass NOT IN (SELECT Pass FROM Users))
    -> WHERE Users.Ext = temp.Ext;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(Pass, Name, Context) = (SELECT  Pass, Name, Context FROM temp_Users WHERE temp_' at line 2

I want to update my database from Select result and i am getting this error. Please tell me how i can resolve it ?

Answer 1

MySQL doesn’t support the SET ( multiple_fields ) = ( subquery_that_returns_multiple_fields ) syntax for UPDATE statements. Instead, you have to use a “multiple-table” update (a join). See http://dev.mysql.com/doc/refman/5.6/en/update.html.

Your query has some other problems as well, so I’m not clear on exactly what you want . . . but I think you want something like this:

UPDATE users
  JOIN temp_users
    ON temp_users.ext = users.ext
   SET users.pass = temp_users.pass,
       users.name = temp_users.name,
       users.context = temp_users.context
 WHERE temp_users.pass NOT IN
        -- extra subquery to bypass MySQL limitation:
        ( SELECT pass
            FROM ( SELECT pass
                     FROM users
                 ) t
        )
;