SQL 触发器 新建时删除相同数据

--create
alter trigger [dbo].[trigger_sqsj]
on [dbo].[lctnrcrd]
after INSERT as
BEGIN
declare @id char(50)
 select @id = (select top 1 id from [lctnrcrd] order by CONVERT(char(16),dlr,120) desc)
 print @id
 delete from [lctnrcrd]
 --select * from [lctnrcrd]
 where id = @id and
 idowner+CONVERT(char(16),dlr,120) in
(select idowner+CONVERT(char(16),dlr,120) from [lctnrcrd] where id not in(@id))
--select * from [lctnrcrd] order by CONVERT(char(16),dlr,120) desc
END
--select * from [lctnrcrd] order by CONVERT(char(16),dlr,120) desc