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我将 TableA 和 TableB 放入 SQL Server 2008。

TableA 有一个在 INSERT & UPDATE 之后触发的触发器，在我插入 TableB 的触发器上，所以我的问题是如何从 TableB 中获取插入的 ID？FROM INSERTED 有 TableA 中记录的信息吗？

ALTER TRIGGER [dbo].[trg_up_move] ON [dbo].[TableA] AFTER INSERT, UPDATE
AS 
BEGIN
DECLARE @idMovINS INT
DECLARE @stationINS char(8)
DECLARE @idWorkerINS INT
DECLARE @statusINS TINYINT
SELECT @idMovINS=id_mov FROM INSERTED
SELECT @stationINS=station_number FROM INSERTED
SELECT @idWorkerINS=id_worker FROM INSERTED
SELECT @statusINS=status_mov FROM INSERTED
-- CODE

-- MORE CODE

-- MUCH MORE CODE

  IF @SOMEVAL='WISE DECISION'
  BEGIN
     DECLARE @idTableB INT
     INSERT INTO TableB (FieldA,FieldB,FieldC)VALUES(@idWorkerINS,@stationINS,'More info')
     --SET @idTableB=@@IDENTITY
     --SET @idTableB=SCOPE_IDENTITY()

     --MAKE SOME OTHER THINGS WITH @idTableB
  END
END

如果我在同一个会话中向 tableA 发送了十万个插入。我可以使用 @@identity 或 scope_identity() （我选择最后一个）来获取 b 插入的身份吗？考虑到每次触发触发器以及完成所有触发器功能的时间，使用这两个功能之一是多​​么方便和安全

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1 回答 1

1

触发器是基于设置的。因此，获得单一身份的概念是错误的。

Aka，如果您插入 10 行，“插入”表将有 10 行。

下面的示例显示了“输出”的使用。我相信它会更好地满足您的需求。

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 /*<< 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; /* <<will be empty at this point */
select * from dbo.AuditTable;

drop table dbo.EmployeeTable, dbo.AuditTable;
go
于 2016-04-26T20:36:45.020 回答