-- 创建触发器CREATETRIGGERInsertTriggerONCustomersAFTERINSERTASBEGIN-- 插入数据时执行的操作-- 这里可以编写任何需要执行的SQL语句-- 示例:向另一张表插入新记录INSERTINTOAnotherTable(CustomerID,DateInserted)SELECTID,GETDATE()FROMinserted;END; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 1...
1.插入操作(Insert) Inserted表有数据,Deleted表无数据 2.删除操作(Delete) Inserted表无数据,Deleted表有数据 3.更新操作(Update) Inserted表有数据(新数据),Deleted表有数据(旧数据)[ INSTEAD OF 触发器用来代替通常的触发动作,即当对表进行INSERT、UPDATE 或 DELETE 操作时,系统不是直接对表执行这些操作,而是把...
CREATE TRIGGER IO_Trig_INS_Employee ON Employee INSTEAD OF INSERT AS BEGIN SET NOCOUNT ON -- Check for duplicate Person. If there is no duplicate, do an insert. IF (NOT EXISTS (SELECT P.SSN FROM Person P, inserted I WHERE P.SSN = I.SSN)) INSERT INTO Person SELECT SSN,Name,Address,...
INSERT INTO users (username, email, password) VALUES ('john_doe', 'john.doe@example.com', 'secure_password'); 查看触发器 要查看数据库中的触发器,可以使用SHOW TRIGGERS语句。例如,要查看当前数据库中的所有触发器,可以使用以下SQL语句: SHOW TRIGGERS; 修改触发器 要修改触发器的定义,可以使用DROP TR...
【insert 时 NEW 表示新插入的行数据】 4、创建触发器: CREATE TRIGGER "example_trigger"AFTER INSERT ON A FOR EACH ROW EXECUTE PROCEDURE insert_table(); 【AFTER 关键字决定是在关联行的插入之后执行触发器动作】 【FOR EACH ROW 在一次操作表的语句中,每操作成功一行就会触发一次;不写的 话,表示是表级...
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....
GOSETIDENTITY_INSERT T1ON; GOINSERTINTOT1 (column_1,column_2)VALUES(-99,'Explicit identity value'); GOSELECTcolumn_1, column_2FROMT1; GO C. Inserting data into a uniqueidentifier column by using NEWID() The following example uses theNEWID() function to obtain a GUID for column_2. Unlike...
Create Triger Example CREATE OR REPLACE TRIGGERmy_sal_changes BEFORE DELETE OR INSERT OR UPDATE ON Emp_tab FOR EACH ROW WHEN (new.Empno > 0) DECLARE sal_diff number; BEGIN sal_diff := :new.sal – :old.sal; dbms_output.put(‘Old salary: ‘ || :old.sal); ...
The INSERT statement inserts rows into a table or view. Inserting a row into a view inserts the row into the table on which the view is based if no INSTEAD OF INSERT trigger is defined for this view. If such a trigger is defined, the trigger is activated instead. ...
当为表或视图的 INSERT 操作定义了 INSTEAD OF 触发器时,则执行该触发器而不是 INSERT 语句。 有关 INSTEAD OF 触发器的详细信息,请参阅 CREATE TRIGGER (Transact-SQL)。限制和局限当向远程表中插入值且没有为所有列指定所有值时,用户必须标识将向其中插入指定值的列。