Unknown column 'md5pass' in 'field list'

Unknown column 'md5pass' in 'field list' unknown PHP连接数据库碰到问题.Cannot query the database.Unknown column 'event_name' in 'field list' com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:Unknown column '999_Apronsotoldersowels.jpg' in 'field list'这是什么原因? COLUMN Unknown column '何宇' in 'field list'jsp连接数据库时出现错误,具体内容如上, 在MySQL中出现Unknown column 'abc' in 'field list'怎么解决?在添加表格内容中 该用哪种单引号啊? Unknown column 'a' in 'field list'int i=1;String str=qinyue;String ss=insert into liuyansf(userid,username)values(+i+,+str+);为什么 i=1 就可以 顺利的显示在数据库中而str=“qinyue 就不行哦,就会出现Unknown column 'qiny UNKNOWN APPLICATION UNKNOWN怎么样 Unknown是什么意思 unknown是什么意思 Orion Unknown color column column是什么意思 Papyrus column =IF(COLUMN()>ROW(),,COLUMN()&×&ROW()&=&COLUMN()*ROW()) unknown什么意思