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