通过查看其他示例,我提出了以下内容,但它似乎并不像我希望的那样工作:我希望它仅在QtyToRepair
值已更新时才更新修改后的信息。 ..但它没有那样做。
如果我注释掉了哪里,则在每种情况下都会更新修改后的信息。正如我所说的其他例子让我变得乐观。任何线索都表示赞赏。感谢。
沃尔特
ALTER TRIGGER [dbo].[tr_SCHEDULE_Modified]
ON [dbo].[SCHEDULE]
AFTER UPDATE
AS
BEGIN
SET NOCOUNT ON;
UPDATE SCHEDULE SET modified = GETDATE()
, ModifiedUser = SUSER_NAME()
, ModifiedHost = HOST_NAME()
FROM SCHEDULE S
INNER JOIN Inserted I on S.OrderNo = I.OrderNo and S.PartNumber = I.PartNumber
WHERE S.QtyToRepair <> I.QtyToRepair
END
答案 0 :(得分:115)
您的问题有两种方式:
1-在触发器中使用更新命令。
ALTER TRIGGER [dbo].[tr_SCHEDULE_Modified]
ON [dbo].[SCHEDULE]
AFTER UPDATE
AS BEGIN
SET NOCOUNT ON;
IF UPDATE (QtyToRepair)
BEGIN
UPDATE SCHEDULE
SET modified = GETDATE()
, ModifiedUser = SUSER_NAME()
, ModifiedHost = HOST_NAME()
FROM SCHEDULE S INNER JOIN Inserted I
ON S.OrderNo = I.OrderNo and S.PartNumber = I.PartNumber
WHERE S.QtyToRepair <> I.QtyToRepair
END
END
2-使用已插入表和已删除表之间的连接
ALTER TRIGGER [dbo].[tr_SCHEDULE_Modified]
ON [dbo].[SCHEDULE]
AFTER UPDATE
AS BEGIN
SET NOCOUNT ON;
UPDATE SCHEDULE
SET modified = GETDATE()
, ModifiedUser = SUSER_NAME()
, ModifiedHost = HOST_NAME()
FROM SCHEDULE S
INNER JOIN Inserted I ON S.OrderNo = I.OrderNo and S.PartNumber = I.PartNumber
INNER JOIN Deleted D ON S.OrderNo = D.OrderNo and S.PartNumber = D.PartNumber
WHERE S.QtyToRepair <> I.QtyToRepair
AND D.QtyToRepair <> I.QtyToRepair
END
当您对表SCHEDULE
使用update命令并将QtyToRepair
列设置为新值时,如果新值等于一行或多行中的旧值,则解决方案1更新Schedule表中的所有更新行但是解决方案2更新仅计划旧值不等于新值的行。
答案 1 :(得分:18)
fyi我最终得到的代码:
IF UPDATE (QtyToRepair)
begin
INSERT INTO tmpQtyToRepairChanges (OrderNo, PartNumber, ModifiedDate, ModifiedUser, ModifiedHost, QtyToRepairOld, QtyToRepairNew)
SELECT S.OrderNo, S.PartNumber, GETDATE(), SUSER_NAME(), HOST_NAME(), D.QtyToRepair, I.QtyToRepair FROM SCHEDULE S
INNER JOIN Inserted I ON S.OrderNo = I.OrderNo and S.PartNumber = I.PartNumber
INNER JOIN Deleted D ON S.OrderNo = D.OrderNo and S.PartNumber = D.PartNumber
WHERE I.QtyToRepair <> D.QtyToRepair
end
答案 2 :(得分:11)
首先应该检查QtyToRepair
是否更新。
ALTER TRIGGER [dbo].[tr_SCHEDULE_Modified]
ON [dbo].[SCHEDULE]
AFTER UPDATE
AS
BEGIN
SET NOCOUNT ON;
IF UPDATE (QtyToRepair)
BEGIN
UPDATE SCHEDULE
SET modified = GETDATE()
, ModifiedUser = SUSER_NAME()
, ModifiedHost = HOST_NAME()
FROM SCHEDULE S INNER JOIN Inserted I
ON S.OrderNo = I.OrderNo and S.PartNumber = I.PartNumber
WHERE S.QtyToRepair <> I.QtyToRepair
END
END
答案 3 :(得分:5)
您想要执行以下操作:
ALTER TRIGGER [dbo].[tr_SCHEDULE_Modified]
ON [dbo].[SCHEDULE]
AFTER UPDATE
AS
BEGIN
SET NOCOUNT ON;
IF (UPDATE(QtyToRepair))
BEGIN
UPDATE SCHEDULE SET modified = GETDATE()
, ModifiedUser = SUSER_NAME()
, ModifiedHost = HOST_NAME()
FROM SCHEDULE S
INNER JOIN Inserted I ON S.OrderNo = I.OrderNo AND S.PartNumber = I.PartNumber
WHERE S.QtyToRepair <> I.QtyToRepair
END
END
请注意,无论值是否相同,每次更新列时都会触发此触发器。
答案 4 :(得分:0)
每当记录更新时,记录被“删除”。这是我的例子:
ALTER TRIGGER [dbo].[UpdatePhyDate]
ON [dbo].[M_ContractDT1]
AFTER UPDATE
AS
BEGIN
-- on ContarctDT1 PhyQty is updated
-- I want system date in Phytate automatically saved
SET NOCOUNT ON;
declare @dt1ky as int
if(update(Phyqty))
begin
select @dt1ky = dt1ky from deleted
update M_ContractDT1 set PhyDate=GETDATE() where Dt1Ky= @dt1ky
end
END
工作正常