# Mysql 查询结果新增一列显示 增加行号

Mysql 查询结果新增一列显示

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查询结果新增一列显示

select as

select 
(select count(*) null_cnt from t_menu where type_id is NULL) as null_cnt,
(select count(*) notnull_cnt from t_menu where type_id is not null) as notnull_cnt

查询结果如下：新增一列显示

增加序号

SELECT
	@rownum :=@rownum + 1 cno,
	x.*
FROM
	(SELECT @rownum := 0) a ,t_menu x