数据库连接错误！错误信息：select count(id) as shu from wen where zong= and nian like'%2018%' and ( di like'%港%' ) and ( yu like'%印%' ) 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 nian like'%2018%' and ( di like'%港%' ) and ( yu like'%印%' )' at line 1