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,
)

--增加
create trigger  triAddGeneralRuleon DetailRule
for insert --为什么事件触发as
begin  insert into [DetailRule_bak](ID,detailRuleName,ParentId,DeleteFlag)select ID,detailRuleName,ParentId,DeleteFlag from INSERTED
end--删除
create trigger  triDelGeneralRuleon GeneralRule
for delete --为什么事件触发as
delete DetailRule
from DetailRule dr,Deleted d
where dr.parentId=d.ID--修改
create trigger  triGeneralRuleon GeneralRule
for update --为什么事件触发as
if update (ID)
beginupdate DetailRule set parentId=i.IDfrom DetailRule dr,Deleted d,Inserted i --2个临时表Deleted和Inserted,分别表示触发事件的旧与新记录where dr.parentId=d.ID
end

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 '工资变动不能超过原来工资的10%'elseupdate employee set salary = @newSalary where emp_id = (select emp_id from updated)end
go