在审计表中传递新/旧参数？

Question

据我所知，审计表是某种跟踪表（即捕获基表中的变化）

INSERT / UPDATE操作如何使用旧值和新值？不知道怎么编码呢

我需要编写AddressLine1 FROM Person.Address

的旧值和新值

这就是我所拥有的一切：

USE AdventureWorks2012;
GO

    -- AL1 is AddressLine1
-- also what about primary key???
CREATE TABLE AuditTable
(
    AL1Old      nvarchar(60)    not null,
    AL1New      nvarchar(60)    not null,
);
GO

-- should I update AuditTable there? 
-- I don't know how to insert Old and New value by trigger...
CREATE TRIGGER triggy
ON Person.Address
AFTER INSERT, UPDATE 
AS
-- ???
GO

Answer 1

如果您想在触发器中插入旧数据和新数据，那么仅在UPDATE触发器中工作 - INSERT触发器没有显然，任何“旧的”数据。

基本上，您需要从Deleted伪表中获取旧数据，并从Inserted伪表中获取新数据。

另外：请注意，每个语句都会调用一次触发器，两个伪表都可以（并且会！）包含多行 - 也可以相应地对触发器进行编程。

要处理Addressline1列 - 尝试这样的事情（是的，我还建议包含主键以识别此数据的行！）

-- AL1 is AddressLine1
-- also what about primary key???
CREATE TABLE AuditTable
(
    PrimaryKey INT NOT NULL,
    AL1Old      nvarchar(60)    not null,
    AL1New      nvarchar(60)    not null,
);
GO

-- I don't know how to insert Old and New value by trigger...
CREATE TRIGGER addressUpdateTrigger
ON Person.Address
AFTER UPDATE 
AS
    INSERT INTO dbo.AuditTable(PrimaryKey, AL1Old, AL1New)
       SELECT
          Inserted.AddressID,      -- primary key
          Deleted.AddressLine1,    -- old data
          Inserted.AddressLine1    -- new data
       FROM 
          Inserted
       INNER JOIN
          Deleted on Inserted.AddressID = Deleted.AddressID

GO