Please Help Me to write a query

Question

I have a table called CLAIMs and I want to find out the rows which have the same claim and member id
having cert ='MEMBER' and Insert date is greater than Other rows within the same claim and memberid.
Eg:
Insert date             claim                    member Id        cert     
7/17/2009               2009106                  1345678         1345678 
8/8/2009                2009106                  1345678         MEMBER 
12/11/2009              2009107            1345679         MEMBER
12/14/2009          2009107                   1345679         1345679
Expected row:
7/17/2009               2009106                  1345678         1345678 
8/8/2009                2009106                  1345678         MEMBER  Please help.

Answer 1

hoek wrote:
Edited by: hoek on Dec 14, 2009 6:14 PMYour solution will show MEMBER even if there are no non-members for the claim, while OP stated:
Insert date is greater than Other+* rows within the same claim and memberid
SQL> with claims as (
  2                  select to_date('8/8/2009','mm/dd/yyyy') insert_date,2009106 claim,1345678 member_id,'MEMBER' cert from dual
  3                 )
  4  select *
  5  from   claims a
  6  where exists ( select null
  7                 from ( select b.insert_date
  8                        ,      b.claim
  9                        ,      b.member_id
10                        ,      b.cert
11                        ,      row_number() over (partition by b.claim, b.member_id order by b.insert_date desc) rn
12                        from   claims b
13                      ) b
14                 where b.claim = a.claim
15                 and   b.member_id = a.member_id
16                 and   b.cert = 'MEMBER'
17                 and   b.rn = 1
18               );
INSERT_DA      CLAIM  MEMBER_ID CERT
08-AUG-09    2009106    1345678 MEMBER
SQL> with claims as (
  2                  select to_date('8/8/2009','mm/dd/yyyy') insert_dt,2009106 claim,1345678 member_id,'MEMBER' cert from dual
  3                 )
  4  select  insert_dt,
  5          claim,
  6          member_id,
  7          cert
  8    from  (
  9           select  c.*,
10                   max(case cert when 'MEMBER' then null else insert_dt end) over(partition by claim,member_id) max_non_member_dt,
11                   max(case cert when 'MEMBER' then insert_dt end) over(partition by claim,member_id) max_member_dt
12             from  claims c
13          )
14  where max_non_member_dt < max_member_dt
15  /
no rows selected
SQL> SY.