Create Trigger truStudent On Student --在Student表中创建触发器 for Update --为什么事件触发 As --事件触发后所要做的事情 if Update(StudentID) begin Update BorrowRecord Set StudentID=i.StudentID From BorrowRecord br , Deleted d ,Inserted i --Deleted和Inserted临时表 Where br.StudentID=d.Student...
好了,下面让我们看看触发器的主要部分: CREATE TRIGGER [dbo].[tr_Update] ON AFTER UPDATE AS BEGIN SET NOCOUNT ON; SELECT mid=IDENTITY(int,1,1),* INTO #i FROM inserted IF @@rowcount=0 RETURN SELECT mid=IDENTITY(int,1,1),* INTO #d FROM deleted DECLARE @TableName nvarchar(10),@Recorde...
二﹕SQL Server为每个触发器都创建了两个专用表﹕Inserted表和Deleted表。这两个表。 一﹕ 触发器是一种特殊的存储过程﹐它不能被显式地调用﹐而是在往表中插入记录﹑更新记录或者删除记录时被自动地激活。所以触发器可以用来实现对表实施复杂的完整性约`束。 二﹕SQL Server为每个触发器都创建了两个专用表﹕Inse...
trigger 的简单实用 1.什么是Inserted 和Deleted表 当插入数据的时候,其实是同时向目的表 和inserted表中插入数据,当没有出错时,向数据库中插入提交,inserted表中有刚插入的信息, insert into student ([name],defaltage) output inserted.IDs values('{0}',{1}) 这里输出 刚插入的ids 如果出错,就不向数据库...
-- Syntax for SQL Server and Azure SQL Database [ WITH <common_table_expression> [...n] ] UPDATE [ TOP ( expression ) [ PERCENT ] ] { { table_alias | | rowset_function_limited [ WITH ( <Table_Hint_Limited> [ ...n ] ) ] } | @table_variable } SET { column_name = {...
FIRE_TRIGGERS Applies to: SQL Server 2008 (10.0.x) and later. Specifies that any insert triggers defined on the destination table execute during the binary data stream upload operation. For more information, see BULK INSERT (Transact-SQL). CHECK_CONSTRAINTS Applies to: SQL Server 2008 (10.0....
在DML 触发器中,inserted 和 deleted 表主要用于执行以下操作:扩展表之间的引用完整性。 在以视图为基础的基表中插入或更新数据。 检查错误并采取相应的措施。 找出数据修改前后表的状态差异并基于该差异采取相应的措施。删除的表会存储 DELETE 或 UPDATE 语句更改行之前触发器表中这些受影响的行的副本(触发器表是...
(10), inserted xml, deleted xml ) GO -- a. 异步发送处理消息的触发器 CREATE TRIGGER TR_async_trigger ON dbo.t1 FOR INSERT, UPDATE, DELETE AS IF @@ROWCOUNT = 0 RETURN SET NOCOUNT ON -- 将要发送的数据生成xml 数据 DECLARE @message xml SELECT @message = ( SELECT table_name = ( ...
FL 500The CREATE TRIGGER (advanced) statement defines an advanced trigger in a schema and builds a trigger package at the current server. Each time that the trigger activates, the trigger package executes one or more times. FL 500For a description of the differences between basic and advanced ...
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