选择数据,将计算值设置为列

以下是SQL Server的示例:

if object_id('TriggerTest') is not null
    drop table TriggerTest

create table TriggerTest (id int identity, name varchar(50), inLastUpdate bit)

insert TriggerTest (name) values ('joe'), ('barrack'), ('george'), ('dick')
go
create trigger dbo.TriggerTestDelete
on TriggerTest
after update
as begin
    declare @date datetime
    set @date = GETDATE()

    update  dbo.TriggerTest
    set     inLastUpdate = 
                 case when id in (select id from inserted) then 1 
                       else 0 
                 end
end
go
update TriggerTest set name = name where id in (1,2)
update TriggerTest set name = name where id in (1,3)
select * from TriggerTest

印刷品:

id    name        inLastUpdate
1     joe         1
2     barrack     0
3     george      1
4     dick        0