查询语句错误 [1064] 错误信息: 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 'AND first = 1' at line 1 SQL: SELECT subject FROM {tablepre}forum_post WHERE tid = AND first = 1 Backtrace: forum.php:55 -> source\function\function_core.php:1157 -> source\function\function_core.php:1191 -> source\plugin\dsc\dsc.class.php:63 -> source\class\class_core.php:879 -> source\class\class_core.php:912 -> source\class\class_core.php:673 -> source\class\class_core.php:689