HI,
Not that it is really going to make that much difference
A database is not 'magic' even with compression there can be a significant overhead in just storing the data, (record structure,pointers,indexes,disk headers etc)

Even if you don't need to store 16k of data per page……. just the secret key…..
we all know (hopefully) that the public address can be re-generated from the secret key via an algorithm otherwise what is the point…..

A better way is going to be  extract all addresses from block chain,  sort them( plus date first used), then use a stat algo to see if there is any grouping, finally generate private keys see if it is in the 'range' of the grouping .. if so..  store for later. ( you require the blockchain rather than generate on your own kit as this would not highlight platform/implementation weaknesses in the systems)

RF