MySQL update join with limit

Question

I would like to know how to update a table, with values from another table, by the trick is I need to set a limit because I have thousands of rows to update, and PHPmyadmin can\

Answer 1

sqlFiddle in this example I am only doing 5 rows, you can change the limit to 0,100 if you'd like

UPDATE wp_postmeta,
      (SELECT oldmap,newmap
       FROM wp_map 
       ORDER BY oldmap,newmap limit 0,5)as wp_map
SET wp_postmeta.meta_value = wp_map.newmap
WHERE wp_map.oldmap = wp_postmeta.meta_value