NoSQL: Not Just SQL or non-relational. NoSQL database was developed to meet the demands of being greater scalability, speed and more flexible than traditional relational databases because of its simpler data structure.

catch-all word for databases that depart from the relational model of database (graph DBs document DBs keys-value stores, etc.)


MySQL An open-source database management system for relational databases (RDBMS) which is also the most well-known one.


an RDBMS (Relational Database Management System) A program which is aware of what it can do with relational data and that can take SQL and build an application that performs what you've said and then return the results.