Question

    UPDATE messages set test_read =1 
        WHERE userid='xyz' 
        ORDER BY date_added DESC  
        LIMIT 5, 5 ;

I am trying to use this query to update a set of 5 rows using limit but mysql is showing an error..The one below is working

    UPDATE messages set test_read =1 
        WHERE userid='xyz' 
        ORDER BY date_added DESC  
        LIMIT 5 ;

why is the first one not working?

Answer 1

If you really must do it this way, you can use something like this:

 UPDATE messages SET test_read=1
 WHERE id IN (
     SELECT id FROM (
         SELECT id FROM messages 
         ORDER BY date_added DESC  
         LIMIT 5, 5
     ) tmp
 );