Help me on Sorting Query

Question

Hi folks
i'm using db version
Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
PL/SQL Release 9.2.0.8.0 - Productioni have a two tables t1 and t2, i want to fetch t2 records in sequence order(if any of record matches with t1, that should be in order of t1 record)
here is sample data
with t1 as (select 2001 as pc_id,1 as seq_Order,101 as nt_id, 20 as ch_id, null as parent_nt_id from dual
          union
          select 2002 as pc_id,2 as seq_Order,101 as nt_id, 21 as ch_id, null as parent_nt_id from dual
          union
          select 2003 as pc_id,3 as seq_Order,101 as nt_id, 22 as ch_id, null as parent_nt_id from dual)
   ,t2 as (select 2004 as pc_id,1 as seq_Order,201 as nt_id, 30 as ch_id, null as parent_nt_id from dual
           union
          select 2005 as pc_id,2 as seq_Order,201 as nt_id, 20 as ch_id, 101 as parent_nt_id from dual
          union
          select 2006 as pc_id,3 as seq_Order,201 as nt_id, 21 as ch_id, 101 as parent_nt_id from dual
          union
          select 2007 as pc_id,4 as seq_Order,201 as nt_id, 22 as ch_id, 101 as parent_nt_id from dual
          union
          select 2008 as pc_id,5 as seq_Order,201 as nt_id, 31 as ch_id, null as parent_nt_id from dual)
select t2.* from t1,t2
where t2.nt_id = 201
and t2.parent_nt_id = t1.nt_id(+)
and t2.ch_id = t1.ch_id(+)
order by t2.seq_orderdata looks like this
pc_id     seq_order     nt_id     ch_id     parent_nt_id
2004     1          201     30     
2005     2          201     20     101
2006     3          201     21     101
2007     4          201     22     101
2008     5          201     31     if i change SEQ_ORDER in t1, let say
t1 as (select 2001 as pc_id,1 as seq_Order,101 as nt_id, 20 as ch_id, null as parent_nt_id from dual
          union
          select 2002 as pc_id,3 as seq_Order,101 as nt_id, 21 as ch_id, null as parent_nt_id from dual --changed order
          union
          select 2003 as pc_id,2 as seq_Order,101 as nt_id, 22 as ch_id, null as parent_nt_id from dual)--changed orderi want to fetch the records from t2 as below
pc_id     seq_order     nt_id     ch_id     parent_nt_id     t1.seq_order
2004     1          201     30     
2005     2          201     20     101     1
2007     3          201     22     101     2          --changed order 4 to 3
2006     4          201     21     101     3          --changed order 3 to 4
2008     5          201     31     how do i achieve this
Changed join condition in where clause
Edited by: user12212962 on Jan 21, 2010 9:12 AM

Answer 1

Now it's a whole different ballgame as your join is broken again and you would need a full outer join to do what you need.
Where did that 2004 in the new row come from? It's 2009 in the original table data you posted.
pc_id seq_order     nt_id    ch_id  parent_nt_id        t1.pc_id
2004  1             201      30     
2005  2             201      20     101                 2001 
2007  4             201      22     101                 2003 
2006  3             201      21     101                 2002 
null  null          201      28     101                 2004--Is this from the first row above from T2?
2008  5             201      31If the 2004 was meant to be 2009, then this could do it:
with t1 as (select 2001 as pc_id,1 as seq_Order,101 as nt_id, 20 as ch_id, null as parent_nt_id from dual union
            select 2002 as pc_id,3 as seq_Order,101 as nt_id, 21 as ch_id, null as parent_nt_id from dual union
            select 2003 as pc_id,2 as seq_Order,101 as nt_id, 22 as ch_id, null as parent_nt_id from dual union
            select 2009 as pc_id,4 as seq_Order,101 as nt_id, 28 as ch_id, null as parent_nt_id from dual)
   ,t2 as (select 2004 as pc_id,1 as seq_Order,201 as nt_id, 30 as ch_id, null as parent_nt_id from dual union
           select 2005 as pc_id,2 as seq_Order,201 as nt_id, 20 as ch_id, 101 as parent_nt_id from dual union
           select 2006 as pc_id,3 as seq_Order,201 as nt_id, 21 as ch_id, 101 as parent_nt_id from dual union
           select 2007 as pc_id,4 as seq_Order,201 as nt_id, 22 as ch_id, 101 as parent_nt_id from dual union
           select 2008 as pc_id,5 as seq_Order,201 as nt_id, 31 as ch_id, null as parent_nt_id from dual)
SELECT pc_id,
       seq_order,
       nt_id,
       ch_id,
       parent_nt_id,
       pc_id_t1
  FROM (SELECT t2.pc_id,
               t2.seq_order,
               nvl(t2.nt_id, t1.nt_id) nt_id,
               nvl(t2.ch_id, t1.ch_id) ch_id,
               nvl(t2.parent_nt_id, t1.nt_id) parent_nt_id,
               t1.pc_id pc_id_t1,
               t1.seq_order seq_order_t1,
               t1.nt_id nt_id_t1,
               MIN(t2.seq_order) over(PARTITION BY t1.nt_id) min_t2_seq
          FROM t2
          FULL OUTER JOIN t1 ON t2.parent_nt_id = t1.nt_id AND t2.ch_id = t1.ch_id
         WHERE nvl(t2.nt_id, 201) = 201) t
ORDER BY NVL2(t.seq_order_t1, min_t2_seq + (t.seq_order_t1 / 10), t.seq_order)Edited by: fsitja on Jan 21, 2010 3:34 PM