Handle Duplicate Record in Oracle SQL - sql

Question

I have a table with records like below
NAME STATUS xml_configparamdb_id xml_configuration_id
STO INACTIVE 1 1
STO ACTIVE 1 2
BOS ACTIVE 1 3
KYC INACTIVE 1 4
KYC INACTIVE 1 5
ACC ACTIVE 1 6
ACC ACTIVE 1 7
Now result I am interested in is as follows:
NAME STATUS xml_configparamdb_id xml_configuration_id
STO ACTIVE 1 2
BOS ACTIVE 1 3
KYC INACTIVE 1 4
ACC ACTIVE 1 6
That is, I want to select data on basis of STATUS .
Condition -- If STATUS is ACTIVE for both case of same Parameter - select first coming ACTIVE
Condition -- If STATUS is INACTIVE for both case of same Parameter - select first coming INACTIVE
Condition -- If STATUS is ACTIVE & INACTIVE for same Parameter - select ACTIVE
Now I used below query to populate result like above without using PRIMARY KEY Column (xml_configuration_id)
CURSOR cCnfgTypData IS
select distinct name, description, STATUS
from stg_xml_cpdb_configuration
WHERE process_exec_num = 1
AND STATUS = 'ACTIVE'
UNION ALL
select name, description, STATUS
from stg_xml_cpdb_configuration t
where process_exec_num = 1
and STATUS = 'INACTIVE'
and not exists (select * from stg_xml_cpdb_configuration
where name = t.name
and STATUS = 'ACTIVE') order by name, description;
It's showing fine data. But when I execute using PRIMARY KEY Column (xml_configuration_id) like below it's displaying all data without satisfying condition
select distinct name, description, STATUS, xml_configparamdb_id, xml_configuration_id
from stg_xml_cpdb_configuration
WHERE process_exec_num = 1
AND STATUS = 'ACTIVE'
UNION ALL
select name, description, STATUS, xml_configparamdb_id, xml_configuration_id
from stg_xml_cpdb_configuration t
where process_exec_num = 1
and STATUS = 'INACTIVE'
and not exists (select * from stg_xml_cpdb_configuration
where name = t.name
and STATUS = 'ACTIVE') order by name, description;

Answer 1

Use analytic function ROW_NUMBER.
SQL> SELECT name,
2 status,
3 xml_configparamdb_id,
4 xml_configuration_id
5 FROM
6 ( SELECT t.*, row_number() over (partition BY name order by status) rn FROM t
7 )
8 WHERE rn = 1
9 ORDER BY xml_configuration_id
10 /
NAM STATUS XML_CONFIGPARAMDB_ID XML_CONFIGURATION_ID
--- -------- -------------------- --------------------
STO ACTIVE 1 2
BOS ACTIVE 1 3
KYC INACTIVE 1 4
ACC ACTIVE 1 6
SQL>