CREATETRIGGERdbo.trGroups ONgroups AFTERINSERT,UPDATE,DELETE AS --This trigger submits a cached rates delete job for modified groups. --It also updates the groups' last modified columns for modified groups. --It also updates the groups' state (if currently unspecified) based on --the (first...
CREATE TRIGGER dbo.trGroups ON groups AFTER INSERT, UPDATE, DELETE AS -- This trigger submits a cached rates delete job for modified groups. -- It also updates the groups' last modified columns for modified groups. -- It also updates the groups' state (if currently unspecified) based on ...
UPDATE操作触发器执行完成BeforeUpdateAfterUpdateOnTrigger 如上所示,当对Products表执行 UPDATE 操作时,系统首先进入BeforeUpdate状态,然后进入AfterUpdate状态,最后激活触发器执行更新记录的逻辑。 甘特图示例 为了让大家了解触发器的执行时间,下面是一个甘特图示例,描绘了 UPDATE 操作及触发器执行的时间线: 记录价格变化到...
我希望可以透過update trigger來讓table自動更新這一個datetime欄位我所想到的問題是我該如何取得是哪一筆資料做修改呢?如果可以取到資料的primary key(s)是不是就可以在AS之後加上update xxTable SET xx_datetime = getdate() WHERE...這樣的語法呢? 2010年2月1日 上午 06:15 回覆 | 引述 Phoenix W. _...
Create trigger Trig_t2 On Tb_1 For Insert,Update,Delete As declare @id int, @name_1 varchar(20), @status varchar(20) If not exists(Select 1 from deleted) ---Insert Begin select @id=id, @name_1=name_1,@status=status from inserted insert...
代码语言:sql 复制 CREATETRIGGERmy_triggerAFTERINSERTONtableFOR EACH ROWBEGIN-- 对现有记录的更新或插入UPDATEtableSETcolumn=new_valueWHEREcolumn2=new_value2;-- 为INSERT的失败处理编写代码IFROW_COUNT()<>1BEGINRAISERROR('Duplicate entry',16,10);ROLLBACKTRANSACTION;END;END; ...
如需 INSTEAD OF 觸發程序的詳細資訊,請參閱 CREATE TRIGGER (Transact-SQL)。當通用資料表運算式 (CTE) 是 UPDATE 陳述式的目標時,陳述式中所有 CTE 的參考都必須相符。 例如,如果 CTE 被指派 FROM 子句中的別名,此別名就必須用於 CTE 的所有其他參考。 因為 CTE 沒有物件識別碼讓 SQL Server 用來辨識...
Is the name of the column to test for either an INSERT or UPDATE action. Because the table name is specified in the ON clause of the trigger, do not include the table name before the column name. The column can be of anydata typesupported by SQL Server. However, computed columns cannot...
在SQL Server 中,您可以使用触发器来在 UPDATE 事件发生之前执行某些操作。以下是如何创建和使用 BEFORE UPDATE 触发器的步骤: 创建触发器: 代码语言:sql 复制 CREATETRIGGERtr_BeforeUpdateONYourTable INSTEADOFUPDATEASBEGIN-- 在此处添加您的逻辑END 将YourTable替换为您要监视的表名。
When an INSTEAD OF trigger is defined on UPDATE actions against a table, the trigger is running instead of the UPDATE statement. Earlier versions of SQL Server only support AFTER triggers defined on UPDATE and other data modification statements. The FROM clause cannot be specified in an UPDATE ...