Why we need to choose a database?   A database is an organized collections of data that can... Tagged with database, systemdesign, sql, nosql.

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Guide to choosing the right database for your next design. Discusses the differences between relational and non-relational databases, their features and drawbacks, and provides guidance on choosing the appropriate database for specific requirements.

Guide To Choose A Database For Your Next Design

By right, all database should expanse from relational database where many of the problems with databases have been address. Use any relational database with the right ORM such as StORMi and all is good to go.

rule of thumb: default to RDB unless you have a really good reason to opt for NoSQL

Try NoSQL and wait for a bill by the end of the month :) .
Sometimes it is also important to compare the cost of the tool to be used for keeping the application alive.