Two different results using one query

Question

Hi Friends
Oracle version that I am using is : Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
I have a scenario where one account can be related to two customers. Hence, in table have many rows for one account. Here’s the sample data:
Account_ID | product_code | cust_id | relationship_code | entity_code
1111 | ABC | 1234 | SOL | CUST
1111 | ABC | 2222 | ZZZ | LINK
1111 | ABC | 4455 | ABC | LINK
2222 | ABC | 7890 | SOL | CUST
2222 | ABC | 5678 | ZZZ | LINK
3333 | JFK | 5878 | TST | CUST
3333 | JFK | 3254 | PRI | CUST
3333 | JFK | 3299 | PRI | CUST
4444 | JFK | 2535 | SOL | CUST
4444 | JFK | 4565 | SOL | CUST
5555 | DEF | 6666 | PRI | CUST
5555 | DEF | 6667 | TST | CUST
5555 | DEF | 9667 | TST | CUSTIn this scenario, I need two outputs differently:
Output 1: When an account has relationship_code = ‘SOL’ then take the least cust_id
1111 | ABC | 1234 | SOL | CUST
2222 | ABC | 5678 | ZZZ | LINK
4444 | JFK | 2535 | SOL | CUST Output 2: else take the highest cust_id
3333 | JFK | 5878 | TST | CUST
5555 | DEF | 9667 | TST | CUSTHow can I get this result using one query?

Answer 1

Not sure what you mean. Works OK:
SQL> with t as (
  2             select 1111 account_ID,'ABC' product_code,1234 cust_id,'SOL' relationship_code,'CUST' entity_code from dual union all
  3             select 1111,'ABC',2222,'ZZZ','LINK' from dual union all
  4             select 1111,'ABC',4455,'ABC','LINK' from dual union all
  5             select 2222,'ABC',7890,'SOL','CUST' from dual union all
  6             select 2222,'ABC',5678,'ZZZ','LINK' from dual union all
  7             select 3333,'JFK',5878,'TST','CUST' from dual union all
  8             select 3333,'JFK',3254,'PRI','CUST' from dual union all
  9             select 3333,'JFK',3299,'PRI','CUST' from dual union all
10             select 4444,'JFK',2535,'SOL','CUST' from dual union all
11             select 4444,'JFK',4565,'SOL','CUST' from dual union all
12             select 5555,'DEF',6666,'PRI','CUST' from dual union all
13             select 5555,'DEF',6667,'TST','CUST' from dual union all
14             select 5555,'DEF',9667,'TST','CUST' from dual union all
15             select 6666,'XYZ',8877,'SOL','CUST' from dual
16            )
17  select  account_ID,
18          product_code,
19          cust_id,
20          relationship_code,
21          entity_code
22    from  (
23           select  account_ID,
24                   product_code,
25                   cust_id,
26                   relationship_code,
27                   entity_code,
28                   case max(case relationship_code when 'SOL' then 1 else 0 end) over(partition by account_ID)
29                     when 1 then dense_rank() over(partition by account_ID order by cust_id)
30                     else dense_rank() over(partition by account_ID order by cust_id desc)
31                   end rnk
32             from  t
33          )
34    where rnk = 1
35  /
ACCOUNT_ID PRO    CUST_ID REL ENTI
      1111 ABC       1234 SOL CUST
      2222 ABC       5678 ZZZ LINK
      3333 JFK       5878 TST CUST
      4444 JFK       2535 SOL CUST
      5555 DEF       9667 TST CUST
      6666 XYZ       8877 SOL CUST
6 rows selected.
SQL> SY.