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 '2.5410000111111E+19,11' at line 1
select id,title,titleurl,titlepic,smalltext from ***_ecms_appnews where gameid=5191 and leixing=16 order by id desc limit 2.5410000111111E+19,11