How to remove gaps/null values from set of columns in a row

Im trying to implement a solution for removing null value columns from a row.
Basically in below example i have five codes and corresponding id's for that codes.What im trying to achive here is if
i have a null code then i have to move next not null code and id into its new location.
Example:
'A1'cd1,'A2'cd2,null cd3,'A4'cd4,null cd5,'i1'id1,'i2'id2,null id3,'i4' id4,null id5 So here cd4 and id4 should take positions of cd3 and id3.
Output should look like this
cd1 cd2 cd3 cd4 cd5 id1 id2 id3 id4 id5
A1 A2 A4 i1 i2 i4Any help would be highly appreciated for below example:
with temp_table as
(select 'A1'cd1,'A2'cd2,null cd3,'A4'cd4,null cd5,'i1'id1,'i2'id2,null id3,'i4' id4,null id5 from dual union all
select 'A11',null,null,'A44','A55','id11',null,null, 'id44','id55' from dual union all
select null,'A111',null,null,'A555',null,'id111',null, null,'id555' from dual union all
select 'A',null,null,'A1111','E55','id11',null,null, 'id111','id1111' from dual )
select * from temp_table;Edited by: GVR on Dec 1, 2010 8:27 AM

I like case expression B-)
The same question of my homepage http://www.geocities.jp/oraclesqlpuzzle/7-81.html
with temp_table(cd1,cd2,cd3,cd4,cd5,id1,id2,id3,id4,id5) as(
select 'A1' ,'A2' ,null,'A4'   ,null ,'i1' ,'i2'   ,null,'i4'   ,null     from dual union all
select 'A11',null ,null,'A44' ,'A55' ,'id11',null   ,null,'id44' ,'id55'   from dual union all
select null,'A111',null,null   ,'A555',null ,'id111',null,null   ,'id555' from dual union all
select 'A' ,null ,null,'A1111','E55' ,'id11',null   ,null,'id111','id1111' from dual)
select
case when SumCD1 = 1 then CD1
     when SumCD1+SumCD2 = 1 then CD2
     when SumCD1+SumCD2+SumCD3 = 1 then CD3
     when SumCD1+SumCD2+SumCD3+SumCD4 = 1 then CD4
     when SumCD1+SumCD2+SumCD3+SumCD4+SumCD5 = 1 then CD5 end as CD1,
case when SumCD1+SumCD2 = 2 then CD2
     when SumCD1+SumCD2+SumCD3 = 2 then CD3
     when SumCD1+SumCD2+SumCD3+SumCD4 = 2 then CD4
     when SumCD1+SumCD2+SumCD3+SumCD4+SumCD5 = 2 then CD5 end as CD2,
case when SumCD1+SumCD2+SumCD3 = 3 then CD3
     when SumCD1+SumCD2+SumCD3+SumCD4 = 3 then CD4
     when SumCD1+SumCD2+SumCD3+SumCD4+SumCD5 = 3 then CD5 end as CD3,
case when SumCD1+SumCD2+SumCD3+SumCD4 = 4 then CD4
     when SumCD1+SumCD2+SumCD3+SumCD4+SumCD5 = 4 then CD5 end as CD4,
case when SumCD1+SumCD2+SumCD3+SumCD4+SumCD5 = 5 then CD5 end as CD5,
case when SumID1 = 1 then ID1
     when SumID1+SumID2 = 1 then ID2
     when SumID1+SumID2+SumID3 = 1 then ID3
     when SumID1+SumID2+SumID3+SumID4 = 1 then ID4
     when SumID1+SumID2+SumID3+SumID4+SumID5 = 1 then ID5 end as ID1,
case when SumID1+SumID2 = 2 then ID2
     when SumID1+SumID2+SumID3 = 2 then ID3
     when SumID1+SumID2+SumID3+SumID4 = 2 then ID4
     when SumID1+SumID2+SumID3+SumID4+SumID5 = 2 then ID5 end as ID2,
case when SumID1+SumID2+SumID3 = 3 then ID3
     when SumID1+SumID2+SumID3+SumID4 = 3 then ID4
     when SumID1+SumID2+SumID3+SumID4+SumID5 = 3 then ID5 end as ID3,
case when SumID1+SumID2+SumID3+SumID4 = 4 then ID4
     when SumID1+SumID2+SumID3+SumID4+SumID5 = 4 then ID5 end as ID4,
case when SumID1+SumID2+SumID3+SumID4+SumID5 = 5 then ID5 end as ID5
from (select cd1,cd2,cd3,cd4,cd5,id1,id2,id3,id4,id5,
      nvl2(cd1,1,0) as SumCD1,
      nvl2(cd2,1,0) as SumCD2,
      nvl2(cd3,1,0) as SumCD3,
      nvl2(cd4,1,0) as SumCD4,
      nvl2(cd5,1,0) as SumCD5,
      nvl2(id1,1,0) as SumID1,
      nvl2(id2,1,0) as SumID2,
      nvl2(id3,1,0) as SumID3,
      nvl2(id4,1,0) as SumID4,
      nvl2(id5,1,0) as SumID5
      from temp_table)
order by cd1,cd2,cd3,cd4,cd5;
CD1   CD2    CD3   CD4   CD5   ID1    ID2    ID3     ID4   ID5
A     A1111 E55   null null id11   id111 id1111 null null
A1    A2     A4    null null i1     i2     i4      null null
A11   A44    A55   null null id11   id44   id55    null null
A111 A555   null null null id111 id555 null    null nullMy SQL articles of OTN-Japan
http://www.oracle.com/technology/global/jp/pub/jp/ace/sql_image/1/otnj-sql-image1.html
http://www.oracle.com/technology/global/jp/pub/jp/ace/sql_image/2/otnj-sql-image2.html

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Olaf Helper
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