create table num_tb(d datetime,id int)
insert num_tb select '2004-01-01',1
create table tb(id varchar(20),name varchar(10))
create clustered index idx_clu_tb on tb(id)
gocreate trigger tri_tb on tb
instead of insert
asbegin
set nocount on
declare @i int,@id varchar(20),@j int
select @i=count(*) from inserted
begin tran
if exists(select 1 from num_tb where convert(char(8),d,112)=convert(char(8),getdate(),112))
begin
select @j=id from num_tb with(tablockx)
update num_tb with(tablockx) set id=id+@i
endelse
begin
update num_tb with(tablockx) set d=getdate(),id=@i
set @j=0
end***mit tran
select * into #t from inserted
update #t set id=convert(varchar(8),getdate(),112)+right('00000'+rtrim(@j),5),@j=@j+1
insert tb select * from #t
endgo
alter trigger tri_tb on tb
instead of insert
asbegin
set nocount on
declare @i int,@id varchar(20),@j int
select @i=count(*) from inserted
begin tran
update num_tb with(tablockx) set
id=(case when convert(char(8),d,112)=convert(char(8),getdate(),112)
then id+@i else @i end),
@j=(case when convert(char(8),d,112)=convert(char(8),getdate(),112) then id else 0 end),
d=getdate()
***mit tran
select * into #t from inserted
update #t set id=convert(varchar(8),getdate(),112)+right('00000'+rtrim(@j),5),@j=@j+1
insert tb select * from #t
endgo
--建立表
go
--插入記錄測試
declare @i int
set @i=0
while @i<=10000
begin
insert into tb(name) values('張三')
insert into tb(name) select '張四'
union all select '張五'
union all select '張六'
union all select '張七'
union all select '張八'
union all select '張九'
union all select '張十'
set @i=@i+1
endgo
--刪除環境
drop table tb
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