带有变量的MySQL子查询

Question

如何将MySQL变量传递给子查询，如下所示。

select
 v.val, @var:= @var + 1 var 
from 
 (select val from table where id=@var) v, 
 (select @var:= 0) var

Answer 1

select
 v.val ,var
from 
(select val, @var:= @var + 1 var from Table1,(select @var:= 0) var where id=@var+1) v

<强>演示

  

http://sqlfiddle.com/#!9/765e9c/14