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 '6.6157311231055E+19,11' at line 1
select id,title,titleurl,titlepic,smalltext from ***_ecms_appnews where gameid=4231 and leixing=16 order by id desc limit 6.6157311231055E+19,11