sql语句执行失败select * from chapter_6 a left join chapter_content_6 b on a.book_id=b.book_id and a.chapter_id=b.chapter_id where (a.book_id=590 and a.chapter_id= and a.delete_time = 0) 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 a.delete_time = 0)' at line 1错误编码1064

应用:web 控制器:chapter 方法:read 参数:array(2) { [0]=> string(3) "590" [1]=> string(0) "" }