資料庫錯誤發生

Error Number: 1064

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 `row_class` IS NULL ORDER BY `row_date` desc LIMIT 1' at line 6

SELECT * FROM (`common_app_article_list`) WHERE `row_enable` = '1' AND `row_visible` = 1 AND `row_date` < AND `row_class` IS NULL ORDER BY `row_date` desc LIMIT 1

Filename: /home/caotc/www/www/models/model_system/model_db.php

Line Number: 20