Question

我在SQL Server数据库中有一个重要的列（Balance属性Account表）。我在我的程序中跟踪并记录此属性，但我也希望在数据库级别中跟踪并保存此列的更改。我不想跟踪表的所有属性，因为它对我来说并不重要。请帮我找一个好的解决方案。

Answer 1

您可以使用触发器将更改，插入或删除插入到一种审计表中。

https://msdn.microsoft.com/en-AU/library/ms189799(v=sql.110).aspx

CREATE TRIGGER yourInsertTrigger ON Account
FOR INSERT
AS

INSERT INTO yourAuditTable
        (balance, user_id, user_name)
    SELECT
        inserted.balance, user_id, user_name
        FROM inserted
go

但请注意，如果触发器太多，触发操作很昂贵，或者表格经常更新，性能会受到影响。

Answer 2

您可以创建历史记录表：

<强>记录

hrs = raw_input("Enter Hours:")
h = float(hrs)

rate = raw_input("Enter Rate:")
r = float(rate)

pay = h*r
ifh = ("raw_input<=40")

print pay
ifh = ("raw_input>40")

pay = (40*r)+(h-40)*(1.5*r)
print pay

在该表格中，您可以使用表格帐户插入每项更改。为此你可以使用触发器：

account_ID
column_name
old_value
new_value

where子句很重要，因为在插入新行时需要在CREATE TRIGGER account_UID on Account FOR INSERT,UPDATE,DELETE AS BEGIN -- for update INSERT INTO history (account_ID, column_name, old_value, new_value) SELECT I.account_ID, 'balance', D.balance, I.balance FROM inserted as I left join deleted as D on I.account_ID = D.account_ID where D.account_ID is not null and I.balance <> D.balance -- for insert INSERT INTO history (account_ID, column_name, old_value, new_value) SELECT I.account_ID, 'balance', null, I.balance FROM inserted as I left join deleted as D on I.account_ID = D.account_ID where D.account_ID is null -- for delete INSERT INTO history (account_ID, column_name, old_value, new_value) SELECT D.account_ID, 'balance', D.balance, null FROM deleted as D left join inserted as I on D.account_ID = I.account_ID where D.account_ID is not null END中插入null，在删除行时需要old_value ind null

抱歉我的英文。

更改SQL Server中特定列的跟踪

2 个答案: