Single select query or any sql statement with o/p

Question

Hi,
I have one table test_tab with column names empno,empname.The test_tab values is as follows,
empno empname
01 siva
02 ram
03 kamal
04 sathish
i will give the empname values like 'siva,kamal,roshan,sathish' and empno >03,but in the table roshan name is not there.I need the below mentioned o/p
example qry: select empno,empname from test_tab where empname in('siva','kamal','roshan','sathish') and empno>03;
my o/p should be like this,
empname empno
sathish 04
roshan ''
But the empname 'roshan' is not there in table.I need the empname as 'roshan' and empno is null value in a single select query or subquery or any sql statements.
Please help me the resolve this issue.
Thanks
Sivaraman

Answer 1

Hi,
Do you want this?
with data as
(select 1 EMPNO, 'siva' as empname from  DUAL union all
select 2 EMPNO, 'ram' from  DUAL union all
select 3 EMPNO, 'kamal' from  DUAL union all
select 4 EMPNO, 'sathish' from  DUAL union all
select null EMPNO, 'roshan' from  DUAL )
select *  from data
where EMPNAME in ('siva','kamal','roshan','sathish')
   and nvl2(empno,empno,4) > 3