Need help converting SQL "OVER (PARTITION BY )" to JPQL equivalent - JPA

Question

Having trouble converting this query:
select
sdi,
val,
vldtn,
TO_CHAR(sdt, 'yyyy-mm-dd hh:mi:ss AM')
from
select
sdi,
val,
vldtn,
sdt,
max(sdt) over (partition by sdi) as MaxDate1
from
r_ins
) x
where x.sdt = x.MaxDate1
and sdi in (1234,2345,3456,4567,5678,6789,7890);
to JPQL equivalent using JPA
Able to convert simple queries but I do not know how to handle the "over (partition by sdi)" portion of the query.
Can anyone help
TIA
Jer

Answer 1

Paul Horth wrote:
Why have the power (and cost) of Oracle and then not use those powerful features because you are restricting yourself to a vanilla set of SQL because you are using some generic framework.You know how it is :
1 - Application developers create code & queries but only test them on tiny database with low volume and no concurrency at all.
2 - Application goes Live, Database grows (as expected) but stupid optimizer is not as fast as on test environment (that was mostly empty)
3 - Queries are now 200 times slower.
4 - Expensive DB expert comes and gathers statistics, creates indexes, rewrites queries, uses hint/outline/SQLprofile.
Conclusion : Database is evil and prevent application from working efficiently, the proof of all that being : nothing had to be done on application's side to make things work correctly. Database is declared guilty.
Which could translate to :
1 - Team buy a formula one with 800HP that can reach 200mph in less than 10 seconds.
2 - Give it a pilot that doesn't even want to understand what-the-heck is a gearbox/transmission. Pilot only drives in 1st gear.
3 - The formula one is now doing 0.003 miles per gallon, doing the hell of a noise, and is limited to 80mph +(any $10000 family wagon is faster in average)+
4 - Expensive expert comes and check everything in the formula one. Finally understand the problem and modify the gearbox to a sloppy automatic transmission
Conclusion : Formula 1 is evil and prevent pilot from being fast. The proof of that being : nothing had to be changed on pilot's side to make things work correctly. Formula 1 is declared guilty.
You cannot win race without understanding how the car/engine/transmission/physics/race rules work.
Too much levels of abstraction is bad. Treating the database as a black box is the most seen "Bad Idea" these days (to my point of view).
Warning: I am biased towards Oracle :-)And so am I.
(^_^)