有一张员工工作表work。有工作的起止时间和工作日统计列starttime,endtime,datenum。现在要查询一段时间内员工的工作日。我写了个存储过程来计算查询时间内员工的工作日:datecut。
输入参数是starttime(工作开始时间),endtime(工作结束时间),qstarttime(查询开始时间),qendtime(查询结束时间)。输出参数是datenum(查询时间段内员工的工作日)。
可是我新建存储过程调用
create [dbo].[query]
@qstarttime datetime,
@qendtime datetime
as
declare dn int
select
exec datecut starttime,endtime,@qstarttime,@qendtime,dn as 天数
from work
不行,为什么?
是不是要建临时表,再计算工作日?
------解决方案--------------------
select
from work
这个中间执行PROCEDURE干什么用呢?
------解决方案--------------------
- SQL code
exec datecut starttime,endtime,@qstarttime,@qendtime,dn as 天数from work--哪有这个用法?你datecut过程丢出来
------解决方案--------------------
不能由
select exec procedure from...
来获得数据.
必须建一个临时表或表变量,用这样的方法从存储过程获得记录集:
insert into @t
exec procedure .....
------解决方案--------------------
- SQL code
第一种方法: 使用output参数USE AdventureWorks;GOIF OBJECT_ID ( 'Production.usp_GetList', 'P' ) IS NOT NULL DROP PROCEDURE Production.usp_GetList;GOCREATE PROCEDURE Production.usp_GetList @product varchar(40) , @maxprice money , @compareprice money OUTPUT , @listprice money OUTAS 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 TestasDECLARE @compareprice money, @cost money EXECUTE Production.usp_GetList '%Bikes%', 700, @compareprice OUT, @cost OUTPUTIF @cost <= @compareprice BEGIN PRINT 'These products can be purchased for less than $'+RTRIM(CAST(@compareprice AS varchar(20)))+'.'ENDELSE 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 GetUserNameasbegin select 'UserName'endCreate table #tempTable (userName nvarchar(50))insert into #tempTable(userName)exec GetUserNameselect #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 [email protected]+' and [email protected]+' and [email protected]+'=''否'') and ClassroomType=''1''' --exec(@rsql) set @csql='select @a=sum(teststucount),@b=sum(classcount) from EA_ClassRoom where classroom_id in ' set @[email protected][email protected] exec sp_executesql @rc,[email protected] int output,@b int output',@cstucount output,@ccount output--将exec的结果放入变量中的做法 --select @[email protected] --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