SQL: output的用法

Create procedure ordertotal

        @order_total money output

as

begin

select @order_total = sum(item_price*quantity) from oders where .....

end

@order_total定义为OUTPUT，因为要从存储过程返回合计值

 

 

调用它：

Declare @order_total money

execute ordertotal @order_total output

select @order_total