columnName老师没有用上,而且老师的输出字段名字不对老师输出的是select * from user where 1=1 and userName='hls' and age=19这个userName不应该是数据库的名字user_name吗?userName类的名字
select * from user where 1=1 and userName='hls' and age=19
应该是这个吧
select * from user where 1=1 and user_name='hls' and age=19