SQL2005中不用标识列自动增加编号,该如何解决

create table #tt(id varchar(10))insert into #tt select 'G000000002'insert into #tt select 'G000000003'insert into #tt select 'G000000004'insert into #tt select 'G000000202'insert into #tt select 'G000000122'select 'G'    +replicate('0',len(max(id))-1-len(max(cast(substring(id,patindex('%[1-9]%',id),len(id))as int))+1))    +cast(max(cast(substring(id,patindex('%[1-9]%',id),len(id))as int))+1 as varchar(10)) from #tt------------------------------G000000203(1 行受影响)