sql 增加、修改、删除触发器小例子

sql 增加数据的例子

ALTER trigger createPerson on Person
for insert
as
begin
declare @name nchar(10)

select @name=name from inserted
INSERT INTO PersonCopy
(
 
 name
)
VALUES
(
 @name
)
print '结果为：'+@name
 --insert into storeInfo(storeID,mID) values((select mID from ))

end

sql 修改数据时的触发器

USE [hh]
GO
/****** 对象:  Trigger [dbo].[UpdatePerson]    脚本日期: 05/15/2013 08:58:27 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER trigger [dbo].[UpdatePerson]
on [dbo].[Person]
    for update
as
    declare @oldName nchar(10), @newName nchar(10);
    --更新前的数据
    select @oldName = name from deleted;
    if (exists (select name from PersonCopy where name=@oldName))
        begin
            --更新后的数据
            select @newName = name from inserted;
            update PersonCopy set name = replace(name, @oldName, @newName) where name=@oldName;
        end

 sql 删除触发器

alter TRIGGER DeletePerson ON Person
FOR delete
AS
BEGIN
 DECLARE @name  nchar(10);
 SELECT @name=name FROM deleted
 DELETE FROM PersonCopy WHERE name=@name
end

 sql判断触发器是否存在

if (object_id('createPerson', 'TR') is not null)
    drop trigger createPerson