查询 SELECT uname,uno,addr FROM users 按uname,uno排序 SELECT uname,uno,addr FROM users order by uname,uno 或者 SELECT uname,uno,addr FROM users order by 1,2 想要猜解几个字段 SELECT uname,uno,addr FROM users order by 3 没错误 SELECT uname,uno,addr FROM users order by 4 出现错误 所以说明有三个字段
