Usage of Hints

Question

Hello All:
I need suggestions in the tuning of the SQL Stat.
Example:
Select * from dept
where deptno = (select max(a.deptno)
from dept a
where a.deptno = deptno.deptno)
The query is a simulated one to my req.
Here in the Corelated sub query can use the FIRST_ROWS hint make
my query to execute fast.
Normally we use FIRST_ROWS to for better response time rather
than better thruogh put.
for the Corelated sub query we get only one record wich
qualifies for the parent query.
Suggest me is there a better way to improve the perfomance of
the query. the table conatis 100000 records.

Answer 1

I dont understand the meaning of your query.
The result of:
select * from dept d
where deptno = (select max(a.deptno)
from dept a
where a.deptno = d.deptno);
is logicaly the same as:
select * from dept;
Which version of Oracle are you using?