創建表：

CREATE TABLE [dbo].[GeneralRule]([ID] [int] NOT NULL,[GeneralRuleName] [nvarchar](50) NULL,[DeleteFlag] [int] NOT NULL )CREATE TABLE [dbo].[DetailRule]([ID] [int] NOT NULL,[DetailRuleName] [nvarchar](50) NULL,[ParentId] [int] NULL,[DeleteFlag] [int] NOT NULL, )CREATE TABLE [dbo].[DetailRule_bak]([ID] [int] NOT NULL,[DetailRuleName] [nvarchar](50) NULL,[ParentId] [int] NULL,[DeleteFlag] [int] NOT NULL, )

創建觸發器：

--增加 create trigger triAddGeneralRuleon DetailRule for insert --為什么事件觸發as begin insert into [DetailRule_bak](ID,detailRuleName,ParentId,DeleteFlag)select ID,detailRuleName,ParentId,DeleteFlag from INSERTED end--刪除 create trigger triDelGeneralRuleon GeneralRule for delete --為什么事件觸發as delete DetailRule from DetailRule dr,Deleted d where dr.parentId=d.ID--修改 create trigger triGeneralRuleon GeneralRule for update --為什么事件觸發as if update (ID) beginupdate DetailRule set parentId=i.IDfrom DetailRule dr,Deleted d,Inserted i --2個臨時表Deleted和Inserted,分別表示觸發事件的舊與新記錄where dr.parentId=d.ID end

?if else 觸發器

create table employee(emp_id int,emp_name nvarchar(50),gender int,department int,salary numeric(10,2))create table updated(emp_id int,salary numeric(10,2))insert into employee values(1,'tom',10,10,6000.00)insert into updated values(1,6500.00)create trigger up_salary on employee INSTEAD OF update as if update (salary) begindeclare @newSalary numeric(10,2)declare @oldSalary numeric(10,2)select @newSalary = salary from updatedselect @oldSalary = salary from employee where emp_id = (select emp_id from updated)if @newSalary > @oldSalary * 1.1 print '工資變動不能超過原來工資的10%'elseupdate employee set salary = @newSalary where emp_id = (select emp_id from updated)end go

?

轉載于:https://www.cnblogs.com/chenh/p/10303790.html

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