присоединиться на ANSI оракула 8i

Question

Я получил этот запрос в Oracle 8i:

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'); 

Я недавно спросил сообщество StackOverflow, и они сказали мне, Oracle 8i не поддерживает ANSI соединений.

как я могу переписать этот запрос для Oracle 8i?

Заранее благодарен!

Answer 1

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, 
      (select ID1,batch_id from SCH2.VW_BATCH) t2, 
      (select ID2,ID1 from SCH1.STEP) t3 
     where t.BATCH_ID = t2.BATCH_ID 
     and t3.ID1 = t2.ID1) t, 
    SCH2.TB_W_MACHINE t4 
where t4.plant_unit = t.plant_unit 
    and (seqnum = 1 or seqnum = cnt) 
    AND (t.BEGIN_DT > '01-jan-2013' AND t.BEGIN_DT < '01-feb-2013');