编辑

Question

我有2张桌子，发货和发票。我有一个after触发器，可以使用发票表中的发票号更新装运表。发票表具有其相关的装运号，每个发票可以多个。

Create Trigger ShipmentInvoice
on Therefore.dbo.Invoice
For Insert
AS
Update cat set
  invoice = Fac.invoice
FROM therefore.dbo.thecat10 cat
INNER JOIN therefore.dbo.vFacturaAlbaran alb
  on alb.shipment COLLATE Modern_Spanish_CI_AS = alb.shipment

这有效，但是每次都会更新整个表。我需要一种方法，仅在激活触发器时才使用最近在发票表中添加的值来更新装运表。

编辑

触发器在发票表上方。我正在使用发票表中的发票号更新发货表。

Answer 1

这有效，但是每次都会更新整个表。我需要一种方法，仅在激活触发器时才使用最近在发票表中添加的值来更新装运表。

因为要同时连接两个表，所以需要使用INSERTED表来仅获取插入的行，如：

Create Trigger ShipmentInvoice
on Therefore.dbo.Invoice
For Insert
AS
Update cat set
  invoice = I.invoice
FROM therefore.dbo.thecat10 cat
INNER JOIN INSERTED I alb ON Cat.ID = I.ID
...

Answer 2

将表更新为已经插入的状态似乎很奇怪；您为什么不事先解决正确的值？这是伪SQL，但是会让您走上正确的路

{
"cID" : "w2-502952",
"soldToId" : "34124",
}
...
...

请注意括号（CREATE TRIGGER ShipmentInvoice ON Therefore.dbo.Invoice FOR INSERT AS UPDATE cat SET invoice = Fac.invoice --There is no table/alias Fac, where is this coming from? inserted? FROM therefore.dbo.thecat10 cat JOIN inserted i ON cat.{Primary/Foreign ID COLUMN} = i.{Primary/Foreign ID COLUMN} INNER JOIN therefore.dbo.vFacturaAlbaran alb ON alb.shipment COLLATE Modern_Spanish_CI_AS = alb.shipment;）中的项目以及我对对象{}的评论。

SQL After触发更新的值触发更新

编辑

2 个答案: