Question

I have a datafile users.dbf . Its size has incresed to 61GB and is an issue. There is not much data in it , it has different user created in it.
Please help me shrinking the users data file.

Thanks,

Nitesh Kumar

Answer 1

UPDATES to the partitioning column are logically equivalent to a DELETE followed by an INSERT. So yes, if you update the status column the row will be moved to the correct partition. The impact on performance is the same as a DELETE followed by an INSERT.

However, partitioning is for ease of management (move historical data to slow disks, splitting index rebuilds into smaller chunks, doing large data loads, etc ) not for performance.

If you are doing this for performance, I’d recommend filtered indexes instead of partitioning.
For example, if you have a select like this:

SELECT t.id, t.c3, t.c5 FROM t WHERE status ='NEW' and datetime > @d1

A filtered index is a much better solution than partitioning.

CREATE INDEX IX_tab_fltr_status_new on t ( datetime ) where (status = 'NEW')