4、还有游客访问有时会显示这个: SQL: SELECT t.tid,t.subject,t.replies FROM [Table]threads t WHERE t.displayorder!='-1' and t.fid IN () ORDER BY rand() LIMIT 0, 20 Error: You have an error in your SQL syntax; check the manualthat corresponds to your MySQL server version for the right syntax touse near ') ORDER BY rand() LIMIT 0, 20' at line 1