第一步:创建一个新的数据库 CREATEDATABASETriggerExample; 1. 首先,我们需要创建一个新的数据库来存储我们的示例数据和触发器。使用CREATE DATABASE语句可以创建一个名为TriggerExample的数据库。 第二步:创建一个包含触发器的表 USETriggerExample;CREATETABLEEmployees(IDINTPRIMARYKEY,NameVARCHAR(50),SalaryINT); ...
CREATE TRIGGER trg_PreventDropTable ON DATABASE FOR DROP_TABLE AS BEGIN -- 检查要删除的表名 IF EVENTDATA().value('(/EVENT_INSTANCE/ObjectName)[1]', 'NVARCHAR(128)') = 'ExampleTable' BEGIN -- 抛出错误,阻止删除操作 RAISERROR('不允许删除表 ExampleTable', 16, 1); ROLLBACK TRANSACTION; ...
ALTER TABLE trig_example DISABLE TRIGGER trig1 GO 1. 2. 恢复: ALTER TABLE trig_example ENABLE TRIGGER trig1 GO 1. 2. --禁用某个表上的所有触发器 ALTER TABLE 你的表 DISABLE TRIGGER all 1. --启用某个表上的所有触发器 ALTER TABLE 你的表 enable TRIGGER all 1. --禁用所有表上的所有触发...
using Microsoft.SqlServer.Server; public partial class Triggers { [SqlTrigger(Name="UserNameAudit", Target="Users", Event="FOR INSERT")] public static void UserNameAudit() { SqlTriggerContext triggContext = SqlContext.TriggerContext; SqlParameter userName = new SqlParameter("@username", System.Data...
SQL SERVER 2005 CLR 部署UDT,Triggers,Functions,Procedure,Aggregates ◆[CLR User-Defined Types] ●> A Simple Example: The PhoneNumber Type --Example in 第 201/705 页 Another important thing to remember is that methods and properties on user-defined types are case sensitive, even if the serv...
For example, a DDL trigger created to fire in response to a CREATE_TABLE event can do so whenever a CREATE_TABLE event occurs in the database, or on the server instance. A DDL trigger created to fire in response to a CREATE_LOGIN event can do so only when a CREATE_LOGIN event ...
Below is an example trigger from the AdventureWorks2012 database. You’ll notice the syntax for a SQL trigger is very similar to that of a stored procedure. In fact, the trigger uses the same language to implement its logic as dostored procedures. In MS SQL, this isT-SQL; whereas in Or...
Only direct recursion of AFTER triggers is prevented when the RECURSIVE_TRIGGERS database option is set to OFF. To disable indirect recursion of AFTER triggers, also set thenested triggersserver option to0. Examples The following example shows using recursive triggers to solve a self-referencing...
このステップには Microsoft SQL Server Management Studio (SSMS) が必要です。 次の手順では、db_datareader とdb_datawriter の役割を Microsoft Entra という名前の example-Azure-AD-application-name ID アプリケーションに割り当てます。 指定したコマンドを実行するときは、example-Azure-AD-...
INSTEAD OF triggers, introduced with SQL Server 2000, are intended to be employed in different situations. INSTEAD OF triggers fire in place of the triggering action. For example, if an INSTEAD OF UPDATE trigger exists on the Employees table and an UPDATE statement is executed against the Empl...