How are you identifying those 4000 rows (not records, tables have rows)?
If it is via the person id, then that's a good candidate for an index.
From what you've said it doesn't sound like you need partitioning but I don't know what else you intend doing to this table.
As for the overall design of the table - it depends. You don't give any other information about other tables
and the relationships between them. You don't give information on what processing you need to do.
How about: just do it?
Create an appropriate index and ofcourse Oracle will use it.
In the time you spent wondering what would happen, you already could have tested this.
Documentation is clear about this: if you hit only a few rows out of millions, index access will be chosen.
Partitioning is not useful here.
yes.. records will be indentified by persion_id.
but since persion_id is not unique, will not oracle go for full scan even if there is an index.
thats why we thinking of partition.
Did you actually read what I wrote?
The important bit was
"Oracle will choose the best path to access the rows."
So, create the index, gather statistics and find out yourself!