Get a specific record in duplicates

Question

Hi Experts,
I have a requirement with source table has duplicates so i need to select a row based upon the a condition.
Source table
EMP_NO ENAME SALARY CODE EMP_ID
1 TOM 1000 1 10
1 JOHN 2000 A 20
1 SAM 3000 A 30
2 TOM 500 1 40
2 SUNG 1500 1 50
Desired Output
EMP_NO ENAME SALARY CODE EMP_ID
1 TOM 1000 1 10
2 SUNG 1500 1 50
I tried with MAX and DENSE_RANK but its not getting me the first row.
Please help. Any help will be highly appreciated.
Thanks,
K

Answer 1

Are you looking for something like this?
(You are free to change the "order by" inside the keep dense_rank statement according to your requirements. But it should be the same order for all columns)
-- Test-Data
with yourtable as
select 1 emp_no, 'TOM' ename, 1000 salary,'1' code, 10 emp_id from dual union all
select 1, 'JOHN', 2000, 'A', 20 from dual union all
select 1, 'SAM', 3000, 'A', 30 from dual union all
select 2, 'TOM', 500, '1', 40 from dual union all
select 2, 'SUNG', 1500, '1', 50 from dual
-- Query:
select emp_no,
       min(ename) keep (dense_rank first order by ename, salary, code, emp_id) ename,
       min(salary) keep (dense_rank first order by ename, salary, code, emp_id) salary,
       min(code) keep (dense_rank first order by ename, salary, code, emp_id) code,
       min(emp_id) keep (dense_rank first order by ename, salary, code, emp_id) emp_id
from yourtable
group by emp_no;