參考:bigintInteger (whole number) data from -2^63 (-9223372036854775808) through 2^63-1 (9223372036854775807). Storage size is 8 bytes.intInteger (whole number) data from -2^31 (-2,147,483,648) through 2^31 - 1 (2,147,483,647). Storage size is 4 bytes. The SQL-92 synonym for int is integer.smallintInteger data from -2^15 (-32,768) through 2^15 - 1 (32,767). Storage size is 2 bytes.tinyintInteger data from 0 through 255. Storage size is 1 byte.
但不会超出范围 id会从头开始计数如果想重新排序的话 看一下cloth4(cid,clcode,cloth) cid字段为identity(int,1,1) 重建cid
select * into #aa from cloth4
truncate table cloth4
dbcc checkident(cloth4,reseed,0)
set IDENTITY_INSERT ON
insert cloth4(clcode,clname) select clcode,clname from #aa
//注意不能选择cid列
drop table #aa
要不你用插入的时候用
insert 表 select isnull(max(id),0)+1,其他字段值 from 表