Choosing a DBMS.....?

Question

Database

It is necessary to store and quickly process data.
Data: user, string list.
Processing in style: return all rows of user B, except those that user A has, provided that list B contains N rows from list A.
Example: in most electronic bookstores - "they searched for this book."

Actually a question - what DB it is better to use?

Answer 1

MongoDb - document-oriented DBMS
www.mongodb.org/ Nimble
and convenient. There is a driver for popular YaP.

Answer 2

redis and the SDIFF team

Answer 3

I would recommend berkeley db

Answer 4

Another option is to try Sphinx

Answer 5

Better than the one you know better.
It also depends on the amount of data. How many users and rows do you have?