基本的SQL更新觸發器

Question

我想創建一個觸發器，該表格在更新表中的一行之前運行，並在行更新到存檔表之前將所有字段寫入該行。在更新之前訪問行字段所需的正確語法是什麼，以便我可以將它們寫入我的存檔表中？

編輯：

所以這應該做我想做的，但它似乎並沒有工作。我得到的錯誤「已經有名爲數據庫config_SystemSettings對象：

CREATE TRIGGER [config].[UpdateSystemSettings] 

ON [配置] [SystemSetting] UPDATE 以後爲 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總是想創建一個新表格 - 所以請使用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 

但是您必須首先明確創建[history].[config_SystemSettings]。