SQL一個存儲過程調用另一個存儲過程 獲得返回值問題
2024-07-21 02:44:52
供稿：網友
第一種方法: 使用output參數
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
另一個存儲過程調用的時候:
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)))+'.'
第二種方法:創建一個臨時表
create proc GetUserName
as
begin
select 'UserName'
end
Create table #tempTable (userName nvarchar(50))
insert into #tempTable(userName)
exec GetUserName
select #tempTable
--用完之后要把臨時表清空
drop table #tempTable--需要注意的是，這種方法不能嵌套。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
--這里ａ調ｂ的結果集，而ｂ中也有這樣的應用ｂ調了ｃ的結果集，這是不允許的，
--會報“INSERT EXEC 語句不能嵌套”錯誤。在實際應用中要避免這類應用的發生。
第三種方法:聲明一個變量,用exec(@sql)執行:
1);EXEC 執行SQL語句
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--將exec的結果放入變量中的做法
--select @csql+@rsql
--select @cstucount
