sql查询结果加上序号

https://style.potepan.com/articles/23566.html

DB2的方法

select 
row_number() over(order by jan_code asc) as "ID"
,jan_code as "JANコード" from table

MySQL的方法

SELECT (@i:=@i+1) as 序号,id,name FROM pcd,(select   @i:=0)as it where pid = 0;