SQL Server 创建触发器（trigger）

update 触发器：

if(OBJECT_ID('trigger_compost_up') is not null)
drop trigger trigger_compost_up
go
create trigger trigger_compost_up
on t_com_post                -- 指定创建触发器的表
for update                     -- update 触发器，也可以写为 after update
as 

declare @postid int
declare @postName nchar(40)

if UPDATE(name)
begin
    select @postid = id from deleted
    select @postName = name from inserted
    update t_post_detailinfo set postName = @postName where postid = @postid
end