--try
create trigger geniuswjt on BZDM
instead of insert,update
as

select @baozhuangmingcheng=baozhuangmingcheng from inserted

if @baozhuangmingcheng in ('ZX','ZH')
    select @baozhuangdaima=banbenhao+'-'+long+'-'+wit+'-'+high+'-'+banbenhao from inserted
else
    set @baozhuangdaima=@baozhuangmingcheng
    
if exists(select 1 from BZDM where baozhuangdaima=@baozhuangdaima)
begin
    print '此表中有该代码，不能新增'
    return
end

if exists(select 1 from inserted) and not exists(select 1 from deleted)
    insert into BZDM
    select @baozhuangdaima,baozhuangmingcheng,banbenha,[long],wit,high,beizhu from inserted
else if exists(select 1 from inserted) and exists(select 1 from deleted)
begin
    delete a from BZDM a,deleted b where a.baozhuangdaima=b.baozhuangdaima
    insert into BZDM
    select @baozhuangdaima,baozhuangmingcheng,banbenha,[long],wit,high,beizhu from inserted
end

------解决方案--------------------
SQL code

--声明下变量记得
declare @baozhuangmingcheng varchar(100)
declare @baozhuangdaima varchar(100)

------解决方案--------------------
探讨

SQL code

--try
create trigger geniuswjt on BZDM
instead of insert,update
as

select @baozhuangmingcheng=baozhuangmingcheng from inserted

if @baozhuangmingcheng in ('ZX','ZH')
    select @b……