存储过程调用存储过程的方法总结

存储过程调用存储过程的方法总结

第一种方法: 使用output参数

USE AdventureWorks;

GO

IF OBJECT_ID ( 'Production.usp_GetList', 'P' ) IS NOT NULL

DROP PROCEDURE Production.usp_GetList;

GO

CREATE PROCEDURE Production.usp_GetList @product varchar(40)

, @maxprice money

, @compareprice money OUTPUT

, @listprice money OUT

AS

SELECT p.name AS Product, p.ListPrice AS 'List Price'

FROM Production.Product p

JOIN Production.ProductSubcategory s

ON p.ProductSubcategoryID = s.ProductSubcategoryID

WHERE s.name LIKE @product AND p.ListPrice < @maxprice;

-- Populate the output variable @listprice.

SET @listprice = (SELECT MAX(p.ListPrice)

FROM Production.Product p

JOIN Production.ProductSubcategory s

ON p.ProductSubcategoryID = s.ProductSubcategoryID

WHERE s.name LIKE @product AND p.ListPrice < @maxprice);

-- Populate the output variable @compareprice.

SET @compareprice = @maxprice;

GO

另一个存储过程调用的时候:

Create Proc Test

as

DECLARE @compareprice money, @cost money

EXECUTE Production.usp_GetList '%Bikes%', 700,

@compareprice OUT,

@cost OUTPUT

IF @cost <= @compareprice

BEGIN

PRINT 'These products can be purchased for less than

$'+RTRIM(CAST(@compareprice AS varchar(20)))+'.'

END

ELSE

PRINT 'The prices for all products in this category exceed

$'+ RTRIM(CAST(@compareprice AS varchar(20)))+'.'

第二种方法:创建一个临时表

create proc GetUserName

as

begin

select 'UserName'

end

Create table #tempTable (userName nvarchar(50))

insert into #tempTable(userName)

exec GetUserName

select #tempTable

--用完之后要把临时表清空

drop table #tempTable--需要注意的是，这种方法不能嵌套。例如：

procedure a

begin

...

insert #table exec b

end

procedure b

begin

...

insert #table exec c

select * from #table

end

procedure c

begin

...

select * from sometable

end

--这里a调b的结果集，而b中也有这样的应用b调了c的结果集，这是不允许的，会报“INSERT EXEC 语句不能嵌套”错误。在实际应用中要避免这类应用的发生。

第三种方法:声明一个变量,用exec(@sql)执行:

1);EXEC 执行SQL语句

declare @rsql varchar(250)

declare @csql varchar(300)

declare @rc nvarchar(500)

declare @cstucount int

declare @ccount int

set @rsql='(select Classroom_id from EA_RoomTime where zc='+@zc+' and xq='+@xq+' and T'+@time+'=''否'') and ClassroomType=''1'''

--exec(@rsql)

set @csql='select @a=sum(teststucount),@b=sum(classcount) from EA_ClassRoom where classroom_id in '

set @rc=@csql+@rsql

exec sp_executesql @rc,N'@a int output,@b int output',@cstucount output,@ccount output--将exec的结果放入变量中的做法

--select @csql+@rsql

--select @cstucount