问题:有两个表,结构基本相同。想在表1中增加、删除、更新数据时,同时更新表2。
思路:在表1上建立一个触发器,然后在触发器中将新增加的数据项(有UID类型、INT类型、BIT类型、VCHAR类型、TEXT类型等等),做处理后,再INSERT到表2中。删除与更新的思路相同。
请问:怎么做这样子的触发器?最好有示范代码。
回复1 如下: CREATE TRIGGER [Delete_Employee] ON dbo.Employee FOR DELETE AS delete from Salary from deleted Where Salary.depid=deleted.depid and salary.id=deleted.id CREATE TRIGGER [Insert_Employee] ON dbo.Employee FOR INSERT AS Insert into Salary(DepID,ID,Name,Status) Select DepID,ID,Name,Status from Inserted CREATE TRIGGER [Update Employee] ON dbo.Employee FOR UPDATE AS Update Salary Set Salary.ID=Inserted.ID, Salary.DepID=Inserted.DepID, Salary.Name=Inserted.Name,Salary.Status=Inserted.Status From Inserted,deleted Where deleted.DepID=salary.depid and deleted.id=salary.id
回复2 CREATE TRIGGER 触发器名 ON 表1 FOR INSERT,UPDATE,DELETE AS BEGIN IF (SELECT count(*) FROM deleted)>0 BEGIN DELETE 表2 FROM 表2,deleted WHERE 表2.主键=deleted.主键 IF @@error<>0 GOTO error END IF (SELECT count(*) FROM inserted)>0 BEGIN INSERT 表2 (数据列) SELECT 数据列 FROM inserted IF @@error<>0 GOTO error END RETURN error: ROLLBACK TRANSACTION RETURN END