SELECT @rownum:=@rownum+1 AS 序号, t_user.* FROM t_user ,(SELECT @rownum:=0) r -- 最简写法1
更多写法供参考:
① select (@rowNO := @rowNo+1) AS rowno,uid,uname from (SELECT * FROM t_user ) ;
② select (@rowNO := @rowNo+1) AS rowno,a.* from (SELECT * FROM t_user) a,(select @rowNO :=0) b ;
③ set @rn=0; select @rn:=@rn+1 as rn, m.* from (select * from t_user )m; -- 连续执行两个语句
④ select (@rowNO := @rowNo+1) AS 序号,a.* from t_user a,(select @rowNO :=0) b -- 最简写法2
注意:@rownum的写法不唯一,但一定有@,等于号写法一定是:=(冒号等于)
以下写法都可行:
SELECT @xxoo:=@xxoo+1 AS 序号, t_user.* FROM t_user ,(SELECT @xxoo:=0) r;
SELECT @1:=@1+1 AS 序号, t_user.* FROM t_user ,(SELECT @1:=0) r;
SELECT @:=@+1 AS 序号, a.* FROM t_user a ,(SELECT @:=0) r; (首推)
来张查询结果图:
https://blog.csdn.net/superit401/article/details/78056654?locationNum=8&fps=1