在触发器中使用插入和删除的表 [英] using inserted and deleted tables in the triggers

问题描述

我想编写触发器来处理插入和删除的表。我已经编写了插入触发器：

I want to write triggers to work with the inserted and deleted tables. I have written the trigger for inserting :

CREATE TRIGGER FILL_TABLE
ON Person FOR INSERT
AS
DECLARE @ID int
SELECT @ID = p.ID
FROM Person AS p 
    INNER JOIN inserted AS i ON p.ID = i.ID 
DECLARE @uName char(30);
SELECT @uName = SYSTEM_USER
INSERT tblOperationLog 
 Values 
 ( @uName, 'user has inserted a row with ID = ' + CONVERT(nvarchar, @ID) + '', 
    'Insert', CURRENT_TIMESTAMP, GETDATE() )

我想编写触发器并就像插入的表一样使用删除的表。但我不知道如何我想检索已删除行的ID，以填充tblOperationLog的第二列，但不能。我也应该在其中使用内部联接吗？

I want to write the trigger and use the deleted table just like the inserted one. but I don't know how. I want to retrieve the ID of the deleted rows to fill the second column of the tblOperationLog but I can't. Should I use the inner join in it too?

推荐答案

仅当插入一行时，您的触发器才会起作用。由于已插入可作为表使用，因此您可以从该表中插入并使用所有记录。我认为您正在寻找这样的东西：

Your trigger will only work if only one row has been inserted. As inserted is available as a table, you can insert from that table and use all records. I think you're looking for something like this:

CREATE TRIGGER FILL_TABLE 
ON Person FOR INSERT, DELETE
AS 

  INSERT tblOperationLog  
  SELECT  SYSTEM_USER,'user has inserted a row with ID = ' + ID, 'Insert', 
    CURRENT_TIMESTAMP, getdate()
  FROM inserted

  INSERT tblOperationLog  
  SELECT  SYSTEM_USER,'user has deleted a row with ID = ' + ID, 'Delete', 
    CURRENT_TIMESTAMP, getdate()
  FROM deleted

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