Error in executing UPDATE linktbl SET link_total = , link_clickedsince = , link_lastclicked='2019-04-23 13:52:42' WHERE link_id=39634error: 1064 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 ' link_clickedsince = , link_lastclicked='2019-04-23 13:52:42' WHERE link_id=' at line 1