我在Oracle 8i中得到了这个查询：

select
  decode(seqnum,
            1  , '1',
            cnt, '0'
        ) as                   value1,
  decode(seqnum,
            1  , t.BEGIN_DT,
            cnt, t.END_DT
  ) as                         TIME1,   
           t4.UNIT1 || '.SUBBATCH_TRIGGER' TAG     
      from (select t.*,
                   row_number() over(partition by t.BATCH_ID, t.plant_unit, t3.ID2 order by t.BEGIN_DT) as seqnum,
                   count(*) over(partition by t.BATCH_ID, t.plant_unit, t3.ID2) as cnt
              from SCH2.tb_pg_unit_stap t
    join (select ID1,batch_id from SCH2.VW_BATCH) t2 on t.BATCH_ID = t2.BATCH_ID
    join (select ID2,ID1 from SCH1.STEP) t3 on t3.ID1 = t2.ID1) t
    join SCH2.TB_W_MACHINE t4 on t4.plant_unit = t.plant_unit
    where (seqnum = 1
        or seqnum = cnt) AND (t.BEGIN_DT > '01-jan-2013' AND t.BEGIN_DT < '01-feb-2013');

我最近询问了Stackoverflow社区，他们告诉我Oracle 8i不支持ansi连接。
如何为Oracle 8i重写此查询？
先谢了！