Transact-SQL 語法慣例 SQL Server 語法 syntaxsql 複製 -- SQL Server Syntax -- Trigger on an INSERT, UPDATE, or DELETE statement to a table or view (DML Trigger) CREATE [ OR ALTER ] TRIGGER [ schema_name . ]trigger_n
if exists(select*fromsysobjectswherename='DeletTriggerBookKind') droptriggerDeletTriggerBookKind; go CREATETRIGGERDeletTriggerBookKind ONdbo.BookKindList fordelete--AFTER [DELETE] [,] [INSERT] [,] [UPDATE] AS BEGIN DECLARE @BookKindIDint, @BookKindName nvarchar(500), @BookKindParentint, @Book...
-- SQL Server Syntax-- Trigger on an INSERT, UPDATE, or DELETE statement to a-- table (DML Trigger on memory-optimized tables)CREATE[ORALTER]TRIGGER[schema_name. ]trigger_nameON{ table } [WITH<dml_trigger_option>[ ,...n ] ] {FOR|AFTER} { [INSERT] [ , ] [UPDATE] [ , ] [DEL...
在SQL Server 中,创建CREATE TRIGGER FOR触发器是一个重要的数据库操作,可以自动执行指定的 SQL 代码块以响应特定事件。由于许多开发者在实现该功能时遭遇到各种挑战,因此记录解决过程将有助于将来的参考。 环境准备 首先,我们需要搭建一个适合的环境以支持 SQL Server 的触发器创建。在不同的版本中,SQL Server 触...
-- SQL Server Syntax-- Trigger on an INSERT, UPDATE, or DELETE statement to a-- table (DML Trigger on memory-optimized tables)CREATE[ORALTER]TRIGGER[schema_name. ]trigger_nameON{ table } [WITH<dml_trigger_option>[ ,...n ] ] {FOR|AFTER} { [INSERT] [ , ] [UPDATE] [ , ] [DEL...
在SQL Server xx中,设表T(a,b)上建有如下触发器:CREATE TRIGGER triupdate ON T FOR UPDATE ASIF EXISTS
如需詳細資訊,請參閱 CREATE TRIGGER。 FOREIGN KEY 條件約束可以參考相同資料表中的另一個資料行。 這稱為自我參考。 資料行層級 FOREIGN KEY 條件約束的 REFERENCES 子句只能列出一個參考資料行。 這個資料行必須有定義了條件約束的資料行之相同資料類型。 資料表層級 FOREIGN KEY 條件約束的 REFERENCES 子句,必須...
SQL Копіювати -- Trigger valid for multirow and single row inserts -- and optimal for single row inserts. USE AdventureWorks2022; GO CREATE TRIGGER NewPODetail3 ON Purchasing.PurchaseOrderDetail FOR INSERT AS IF @@ROWCOUNT = 1 BEGIN UPDATE Purchasing.PurchaseOrderHeader SET Sub...
Transact-SQL reference for the CREATE TRIGGER statement, which is used to create a DML, DDL, or logon trigger.
SQL Kopyala -- Trigger valid for multirow and single row inserts -- and optimal for single row inserts. USE AdventureWorks2022; GO CREATE TRIGGER NewPODetail3 ON Purchasing.PurchaseOrderDetail FOR INSERT AS IF @@ROWCOUNT = 1 BEGIN UPDATE Purchasing.PurchaseOrderHeader SET SubTotal = SubTota...