基本的SQL更新触发器

Question

我想创建一个触发器，该表格在更新表中的一行之前运行，并在行更新到存档表之前将所有字段写入该行。在更新之前访问行字段所需的正确语法是什么，以便我可以将它们写入我的存档表中？

编辑：

所以这应该做我想做的，但它似乎并没有工作。我得到的错误“已经有名为数据库config_SystemSettings对象：

CREATE TRIGGER [config].[UpdateSystemSettings] 

ON [配置] [SystemSetting] UPDATE 以后为 BEGIN

SET NOCOUNT ON; 

SELECT old.settingId, old.campId, old.settingKey, old.settingValue 
into [history].[config_SystemSettings] 
FROM [config].[SystemSetting] AS old 
INNER JOIN deleted AS del ON del.settingId = old.settingId 

END GO

Answer 1

SELECT ... INTO总是想创建一个新表格 - 所以请使用INSERT ... SELECT代替：

CREATE TRIGGER [config].[UpdateSystemSettings] 

ON [config].[SystemSetting] AFTER UPDATE AS BEGIN 
SET NOCOUNT ON; 

insert into [history].[config_SystemSettings] (settingId,campId,settingKey,settingValue) 
SELECT old.settingId, old.campId, old.settingKey, old.settingValue 
FROM [config].[SystemSetting] AS old 
INNER JOIN deleted AS del ON del.settingId = old.settingId 

但是您必须首先明确创建[history].[config_SystemSettings]。