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我有一个 SQL Server 存储过程，它引用了我的数据库中的一个表，用户可以在其中手动更新rent字段的值 ( 'Rent1')。该过程将此租金值与不同表 ( 'Rent2') 中的租金字段进行比较。如果与 Is的值Rent1不同，则更新为... 的值，或者至少这是应该发生的。Rent2Rent2Rent1

当我执行这个存储过程时，它运行良好并且我收到这些输出消息：

(1 row(s) affected)


(1 row(s) affected)

这是我所期望的结果，因为作为一种测试手段，我已经将两个值更改为在Rent1和之间不同Rent2。但是当我查询更新后的表时，值保持不变。

这是我的存储过程：

SET QUOTED_IDENTIFIER ON 
GO
SET ANSI_NULLS ON 
GO

ALTER PROCEDURE update_rent
AS
DECLARE @flag INT
SET @flag = (select COUNT(*) from unit_rent left outer join unittype on unittype = scode where rent <> srent)

WHILE (@flag > 0)

BEGIN

IF (select min(rent) from unit_rent 
    left outer join unittype on unittype = scode 
    left outer join property on property.scode = unit_rent.pscode
    where rent <> srent) <>
   (select min(srent) from unit_rent 
    left outer join unittype on unittype = scode 
    left outer join property on property.scode = unit_rent.pscode
    where rent <> srent
    and rent in (select min(rent) from unit_rent
    left outer join unittype on unittype = scode 
    left outer join property on property.scode = unit_rent.pscode
    where rent <> srent))

BEGIN

UPDATE unittype
SET srent = (select min(rent) from unit_rent 
    left outer join unittype on unittype = scode 
    left outer join property on property.scode = unit_rent.pscode
    where rent <> srent)
WHERE unittype.hmy = (select min(hmy) from unittype left outer join unit_rent on unittype = scode where rent <> srent
        and rent = (select min(rent) from unit_rent left outer join unittype on unittype = scode where rent <> srent))

SET @flag = @flag-1;

END 

END

GO
SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

谁能看到我可能出错的地方或告诉我为什么我的输出消息在骗我？或者也许我可以采取不同的方法？我将不胜感激任何形式的帮助，谢谢！

更新：刚刚尝试了一种不同的方法，结果相同，只有 3 条(1 row(s) addected)消息：

ALTER PROCEDURE update_rent
AS
DECLARE @tmprent TABLE (hmy INT, rent decimal(11,2));
DECLARE @flag INT
SET @flag = (select COUNT(*) from unit_rent left outer join unittype on unittype = scode where rent <> srent)

INSERT INTO @tmprent (hmy, rent) values (1, 0.00);

WHILE (@flag > 0)

BEGIN

IF (select min(rent) from unit_rent 
    left outer join unittype on unittype = scode 
    left outer join property on property.scode = unit_rent.pscode
    where rent <> srent) <>
   (select min(srent) from unit_rent 
    left outer join unittype on unittype = scode 
    left outer join property on property.scode = unit_rent.pscode
    where rent <> srent
    and rent in (select min(rent) from unit_rent
    left outer join unittype on unittype = scode 
    left outer join property on property.scode = unit_rent.pscode
    where rent <> srent))

BEGIN

UPDATE @tmprent
SET rent = (select min(rent) from unit_rent 
    left outer join unittype on unittype = scode 
    left outer join property on property.scode = unit_rent.pscode
    where rent <> srent)
WHERE hmy = 1

UPDATE unittype
SET srent = (select rent from @tmprent where hmy = 1)
WHERE unittype.hmy = (select min(hmy) from unittype left outer join unit_rent on unittype = scode where rent <> srent
        and rent = (select min(rent) from unit_rent left outer join unittype on unittype = scode where rent <> srent))

SET @flag = @flag-1;

END 

END
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2 回答 2

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我不知道我的回答对任何人有多大帮助，但如果有机会，我会把它包括在这里..

因此unit_rent，在我的 SP 中引用的表是由我创建的，并填充了我的unittype表中的数据（也在 SP 中引用）。当我填充unit_rent表格时，我从unittype表格中抓取了所有行。这是我犯错误的地方。该unittype表包含与特定单元类型关联的多个单元，因此每当我使用存储过程更新一行时，与该单元类型关联的所有其他单元都将变为!=我更改的租金金额。所以我只用不同的单位类型重新填充了我的unit_rent表，我的问题就解决了。

非常愚蠢的错误，但我不想让它没有答案，因为它可能会帮助其他人。

@granadaCoder -再次感谢您的帮助。第二次你帮助我非常彻底。

于 2013-04-30T15:46:09.323 回答
1

在解决问题的世界中：

在 Update 之前放置一个 select 语句，以查看是否有任何匹配项

/*
UPDATE unittype
SET srent = (select min(rent) from unit_rent 
    left outer join unittype on unittype = scode 
    left outer join property on property.scode = unit_rent.pscode
    where rent <> srent)
*/
select * from unittype
WHERE unittype.hmy = (select min(hmy) from unittype left outer join unit_rent on unittype = scode where rent <> srent
        and rent = (select min(rent) from unit_rent left outer join unittype on unittype = scode where rent <> srent))

或者

declare @myCountCheck
select @myCountCheck =
(select count(*)
from unittype
    WHERE unittype.hmy = (select min(hmy) from unittype left outer join unit_rent on unittype = scode where rent <> srent
            and rent = (select min(rent) from unit_rent left outer join unittype on unittype = scode where rent <> srent))
)

if (@myCountCheck < 1)
BEGIN
    print 'No Row Match !!!'
END

编辑 - - - - - - - - - - - - - - - - - - - -

如果你真的想看看发生了什么，那么编写一些“输出”审计......这样你就可以在 INSERT/UPDATE 语句中捕获正在发生的事情

http://granadacoder.wordpress.com/2008/12/10/sqlserver20052008-output-clause-in-insertupdatedelete-statements/

这是示例代码：

SqlServer2005/2008 // INSERT/UPDATE/DELETE 语句中的 OUTPUT 子句

这些类型的示例在网络上随处可见，但这是我的原始示例，我认为它更清晰。

原始示例位于：http: //blogs.msdn.com/sqltips/archive/2005/06/13/OUTPUT-clause.aspx

create table PrimaryHolderTable ( i int identity (1001,2) not null primary key, j int not null unique )
create table #OutputResultsHolder ( i int not null, j int not null)

insert into PrimaryHolderTable (j)
output inserted.i, inserted.j into #OutputResultsHolder
select top 10 o.object_id from sys.objects as o order by o.object_id desc –&lt;< from sys.objects is there just to provide some rows


select * from #OutputResultsHolder
drop table #OutputResultsHolder, PrimaryHolderTable;

go



create table dbo.EmployeeTable ( EmpKey int identity(1001,2) ,  EmpAge int not null );
create table dbo.AuditTable ( EntityKey int not null default -1  ,  OldValue int null, NewValue int null , Tag varchar(64)  );

insert into dbo.EmployeeTable (EmpAge)
output inserted.EmpKey , null , inserted.EmpAge , ‘Employee Inserted’ into dbo.AuditTable ( EntityKey , OldValue , NewValue , Tag)
 values( 18 );

insert into dbo.EmployeeTable (EmpAge)
output inserted.EmpKey , null , inserted.EmpAge , ‘Employee Inserted’ into dbo.AuditTable ( EntityKey , OldValue , NewValue , Tag) 
 values( 20 );

insert into dbo.EmployeeTable (EmpAge)
output inserted.EmpKey , null , inserted.EmpAge , ‘Employee Inserted’ into dbo.AuditTable ( EntityKey , OldValue , NewValue , Tag) 
 values( 22 );


update dbo.EmployeeTable
   set EmpAge  = EmpAge + 1
output inserted.EmpKey , deleted.EmpAge, inserted.EmpAge , ‘Employee Updated’ into dbo.AuditTable ( EntityKey , OldValue , NewValue , Tag)
 where EmpAge <=20;

delete from dbo.EmployeeTable
output deleted.EmpKey , deleted.EmpAge, NULL , ‘Employee Deleted’  into dbo.AuditTable (EntityKey , OldValue , NewValue , Tag)
 where EmpAge > 0;–Test multi rows

select * from dbo.EmployeeTable;–&lt;<will be empty at this point
select * from dbo.AuditTable;

drop table dbo.EmployeeTable, dbo.AuditTable;
go
于 2013-04-24T17:18:13.787 回答