如何使用SQL变量获取一个存储过程的返回值
如题：
CREATE PROCEDURE [dbo].[ReturnPayKey_no]
@Key_no varchar(1000) output,
@P_type varchar(1000),
@input_date datetime,
@Opter varchar(100)
AS
BEGIN
SET NOCOUNT ON
declare @code varchar(100)
declare @i int
declare @ii int
declare @input varchar(6)
declare @str varchar(10)
set @code=(select ptype_code from t_ptype where ptype_name=@p_type);
set @input=(select replace(CONVERT(char(7),@input_date,111),'/',''));
set @i=(select isnull(max(Convert(int,right(key_no,3))),0) from t_payout where p_type=@p_type and input_d=@input_date and opter=@Opter)+1;
set @ii=len(Convert(varchar(10),@i))
if @ii=1
begin
set @str='00'+Convert(varchar(10),@i)
end
else if @ii=2
begin
set @str='0'+Convert(varchar(10),@i)
end
else
begin
set @str=Convert(varchar(10),@i)
end
set @Key_no=@code+@input+@str
select @Key_no
return @@error
END
CREATE PROCEDURE [dbo].[InserIntoPayout]
@Pay_id int output,
@Key_no varchar(1000) output,
@Input_d datetime,
@Input_date datetime,
@Onput_date datetime,
@Opter varchar(1000),
@State int,
@P_type varchar(100),
@Nominal varchar(1000)
AS
BEGIN
SET NOCOUNT ON;
Exec ReturnPayKey_no @Key_no,@P_type,@Input_d,@Opter
print @Key_no
END
[解决办法]
如果是单一值,参考:
D. 使用 OUTPUT 参数OUTPUT 参数允许外部过程、批处理或多条 Transact-SQL 语句访问在过程执行期间设置的某个值。下面的示例创建一个存储过程 (titles_sum)，并使用一个可选的输入参数和一个输出参数。首先，创建过程：USE pubsGOIF EXISTS(SELECT name FROM sysobjects WHERE name = 'titles_sum' AND type = 'P') DROP PROCEDURE titles_sumGOUSE pubsGOCREATE PROCEDURE titles_sum @@TITLE varchar(40) = '%', @@SUM money OUTPUTASSELECT 'Title Name' = titleFROM titles WHERE title LIKE @@TITLE SELECT @@SUM = SUM(price)FROM titlesWHERE title LIKE @@TITLEGO接下来，将该 OUTPUT 参数用于控制流语言。 说明 OUTPUT 变量必须在创建表和使用该变量时都进行定义。参数名和变量名不一定要匹配，不过数据类型和参数位置必须匹配（除非使用 @@SUM = variable 形式）。 DECLARE @@TOTALCOST moneyEXECUTE titles_sum 'The%', @@TOTALCOST OUTPUTIF @@TOTALCOST < 200 BEGIN PRINT ' ' PRINT 'All of these titles can be purchased for less than $200.'ENDELSE SELECT 'The total cost of these titles is $' + RTRIM(CAST(@@TOTALCOST AS varchar(20)))下面是结果集：Title Name ------------------------------------ The Busy Executive's Database GuideThe Gourmet MicrowaveThe Psychology of Computer Cooking(3 row(s) affected)Warning, null value eliminated from aggregate. All of these titles can be purchased for less than $200.
[解决办法]
存储过程之间的相互调用
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
本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/fredrickhu/archive/2009/09/23/4584118.aspx
