create table P_SystemSequenceTab(

      -- ID列为自增列
      SeqID int identity(1,1) primary key,

      -- Sequence值
      SeqVal varchar(1)
)
go

create procedure P_GetNewSeqVal
as
begin
      -- 声明新Sequence值变量
      declare @NewSeqValue int

      -- 设置插入、删除操作后的条数显示取消
      set NOCOUNT ON

      -- 插入新值到表
      insert into P_SystemSequenceTab (SeqVal) values ('a')   

      -- 设置新Sequence值为插入到表的标识列内的最后一个标识值  
      set @NewSeqValue = scope_identity()   

      -- 删除SeqT_0101001表(不显示被锁行)
      delete from P_SystemSequenceTab WITH (READPAST)

		-- 返回新Sequence值
		return @NewSeqValue

end

go