sqlserver 带输出参数的存储过程

--创建存储过程
create procedure proc_stu
@sname varchar(20),
@pwd varchar(50),
@flag bit output
as
if exists(
select * from dt_manager m where m.user_name=@sname and m.password=@pwd)
select @flag=1
else
select @flag=0
go

--调用
DECLARE @return_value int

EXEC proc_stu 'admin','2',@return_value output

SELECT @return_value as '返回值'