Data versions, query help

Question

Hi,
I have some data organised into a header (main) table, 3 subsidiary (detail) tables and a version table. Whenever a row is inserted into one of the detail tables a new version is created. A detail table doesn't have to have any rows, but the main table always will. I need to report on this showing the data as it is for each version.
Here is some sample data:
WITH main_tab AS
(SELECT 1 id FROM dual),
versions AS
(SELECT 1 main_id, '1.0' ver FROM dual UNION
SELECT 1 main_id, '1.1' ver FROM dual UNION
SELECT 1 main_id, '1.2' ver FROM dual UNION
SELECT 1 main_id, '1.3' ver FROM dual UNION
SELECT 1 main_id, '1.4' ver FROM dual UNION
SELECT 1 main_id, '1.5' ver FROM dual),
detail_tab1 AS
(SELECT 11 id, 1 main_id, 'code11' code, '1.0' ver FROM dual UNION
SELECT 12 id, 1 main_id, 'code12' code, '1.1' ver FROM dual UNION
SELECT 13 id, 1 main_id, 'code13' code, '1.4' ver FROM dual),
detail_tab2 AS
(SELECT 21 id, 1 main_id, 'code21' code, '1.2' ver FROM dual UNION
SELECT 22 id, 1 main_id, 'code22' code, '1.3' ver FROM dual)
detail_tab3 AS
(SELECT 31 id, 1 main_id, 'code31' code, '1.5' ver FROM dual)And expected output:
MAIN_ID VERSION DETAIL_TAB1_ID DETAIL_TAB2_ID DETAIL_TAB3_ID DETAIL_TAB1_CODE DETAIL_TAB2_CODE DETAIL_TAB3_CODE
      1     1.0             11                               code11
      1     1.1             12                               code12
      1     1.2             12             21                code12           code21
      1     1.3             12             22                code12           code22
      1     1.4             13             22                code13           code22
      1     1.5             13             22             31 code13           code22           code31I've tried outer joins with no joy. I'm sure there is a really simple way to do this, but I can't see it. Can anyone help me with this?
Thanks in advance

Answer 1

Thanks Ganesh, that solution works perfectly for version 10. Unfortunately, I forgot to mention that I need it to work in version 9! Using your code as a pointer I managed to work our what to do though:
WITH main_tab AS
(SELECT 1 id FROM dual),
versions AS
(SELECT 1 main_id, '1.0' ver FROM dual UNION
SELECT 1 main_id, '1.1' ver FROM dual UNION
SELECT 1 main_id, '1.2' ver FROM dual UNION
SELECT 1 main_id, '1.3' ver FROM dual UNION
SELECT 1 main_id, '1.4' ver FROM dual UNION
SELECT 1 main_id, '1.5' ver FROM dual),
detail_tab1 AS
(SELECT 11 id, 1 main_id, 'code11' code, '1.0' ver FROM dual UNION
SELECT 12 id, 1 main_id, 'code12' code, '1.1' ver FROM dual UNION
SELECT 13 id, 1 main_id, 'code13' code, '1.4' ver FROM dual),
detail_tab2 AS
(SELECT 21 id, 1 main_id, 'code21' code, '1.2' ver FROM dual UNION
SELECT 22 id, 1 main_id, 'code22' code, '1.3' ver FROM dual),
detail_tab3 AS
(SELECT 31 id, 1 main_id, 'code31' code, '1.5' ver FROM dual)
SELECT   a.main_id,
         a.ver,
         MAX(a.dt1_id) OVER(PARTITION BY a.main_id, a.dt1_sort_key ORDER BY TO_NUMBER(a.ver)) detail_tab1_id,
         MAX(a.dt2_id) OVER(PARTITION BY a.main_id, a.dt2_sort_key ORDER BY TO_NUMBER(a.ver)) detail_tab2_id,
         MAX(a.dt3_id) OVER(PARTITION BY a.main_id, a.dt3_sort_key ORDER BY TO_NUMBER(a.ver)) detail_tab3_id,
         MAX(a.dt1_code) OVER(PARTITION BY a.main_id, a.dt1_sort_key ORDER BY TO_NUMBER(a.ver)) detail_tab1_code,
         MAX(a.dt2_code) OVER(PARTITION BY a.main_id, a.dt2_sort_key ORDER BY TO_NUMBER(a.ver)) detail_tab2_code,
         MAX(a.dt3_code) OVER(PARTITION BY a.main_id, a.dt3_sort_key ORDER BY TO_NUMBER(a.ver)) detail_tab3_code
FROM    (SELECT v.main_id,
                v.ver,
                dt1.id dt1_id,
                dt1.code dt1_code,
                MAX(CASE WHEN dt1.id IS NOT NULL THEN TO_NUMBER(v.ver) ELSE NULL END) OVER (PARTITION BY v.main_id ORDER BY TO_NUMBER(v.ver)) dt1_sort_key,
                dt2.ID dt2_id,
                dt2.code dt2_code,
                MAX(CASE WHEN dt2.id IS NOT NULL THEN TO_NUMBER(v.ver) ELSE NULL END) OVER (PARTITION BY v.main_id ORDER BY TO_NUMBER(v.ver)) dt2_sort_key,
                dt3.id dt3_id,
                dt3.code dt3_code,
                MAX(CASE WHEN dt3.id IS NOT NULL THEN TO_NUMBER(v.ver) ELSE NULL END) OVER (PARTITION BY v.main_id ORDER BY TO_NUMBER(v.ver)) dt3_sort_key
         FROM   main_tab t,
                versions v,
                detail_tab1 dt1,
                detail_tab2 dt2,
                detail_tab3 dt3
         WHERE  t.id      = v.main_id
         AND    v.main_id = dt1.main_id (+)
         AND    v.ver     = dt1.ver (+)
         AND    v.main_id = dt2.main_id (+)
         AND    v.ver     = dt2.ver (+)
         AND    v.main_id = dt3.main_id (+)
         AND    v.ver     = dt3.ver (+)) a
ORDER BY a.main_id,
         TO_NUMBER(a.ver)Now I have another problem. One of the details tables above has its own detail table and I can't see how to do the joins. My sample data:
WITH main_tab AS
(SELECT 1 id FROM dual),
versions AS
(SELECT 1 main_id, '1.0' ver FROM dual UNION
SELECT 1 main_id, '1.1' ver FROM dual UNION
SELECT 1 main_id, '1.2' ver FROM dual UNION
SELECT 1 main_id, '1.3' ver FROM dual UNION
SELECT 1 main_id, '1.4' ver FROM dual UNION
SELECT 1 main_id, '1.5' ver FROM dual UNION
SELECT 1 main_id, '1.6' ver FROM dual UNION
SELECT 1 main_id, '1.7' ver FROM dual),
detail_tab1 AS
(SELECT 11 id, 1 main_id, 'code11' code, '1.0' ver FROM dual UNION
SELECT 12 id, 1 main_id, 'code12' code, '1.1' ver FROM dual UNION
SELECT 13 id, 1 main_id, 'code13' code, '1.4' ver FROM dual),
detail_tab2 AS
(SELECT 21 id, 1 main_id, 'code21' code, '1.2' ver FROM dual UNION
SELECT 22 id, 1 main_id, 'code22' code, '1.3' ver FROM dual,
SELECT 23 id, 1 main_id, 'code23' code, '1.7' ver FROM dual),
detail_tab3 AS
(SELECT 31 id, 1 main_id, 'code31' code, '1.5' ver FROM dual),
detail_detail_tab4 AS
(SELECT 41 id, 1 main_id, 31 detail_tab3_id, 'code41' code, '1.6' ver FROM dual)And expected output:
MAIN_ID VERSION DETAIL_TAB1_ID DETAIL_TAB2_ID DETAIL_TAB3_ID DETAIL_TAB4_ID DETAIL_TAB1_CODE DETAIL_TAB2_CODE DETAIL_TAB3_CODE DETAIL_TAB4_CODE
      1     1.0             11                                              code11
      1     1.1             12                                              code12
      1     1.2             12             21                               code12           code21
      1     1.3             12             22                               code12           code22
      1     1.4             13             22                               code13           code22
      1     1.5             13             22             31                code13           code22           code31
      1     1.6             13             22             31             41 code13           code22           code31           code41
      1     1.7             13             23             31             41 code13           code23           code31           code41Once again thanks in advance