Understanding Hibernate, things it can does or not

[Fred2040]

Hello there , I understand how I can use hibernate and how it works, it's made for modeling database as objets, and it's very good idea because it makes an estructure on best practices. But, I can't figure out, how it really works on practice.. I mean, how can hibernate does more effective a database storage?
For example in a big database who has logs about people activity, a way to store is:

table____activity
column__userid
column__dateStamp
column__activityname

As you can see, storage could be very complicate in simple things. Example: what happend if I want all week data about one user (between one thousand). You know, this action can delay the server.
So, I asking myself if hibernate can solve things like this and how?..

I appreciate, Best Regards

Fred

[Tolls]

You would give hibernate a query (Criteria) that it would use to query the database.
No different to plain JDBC in effect.
All Hibernate does is provide a mapping between objects and database tables/columns. It can cache if you want, it can build those tables if you want, but those are additional to that core of Object-Relational mapping (ORM).