SQL Error: select * from ***_ecms_jianzhang where didian='南京' and classid=6500 or didian='苏州' and classid=6500 or didian='扬州' and classid=6500 or didian='无锡' and classid=6500 or didian='镇江' and classid=6500 or didian='徐州' and classid=6500 order by rand() limit 11