SQL ( Standard Query Language )is a "language" that is used to deal with relational databases relational databases defines the relations in the form of tables, it uses the commands insert, delete, search and update.
noSQL ( Not Only SQL ) doesn't use relations (that's why it's referred to as non relational database) and doesn't require a fixed schema and easy to scale it's used to store a large amount of data and real time web apps companies like Facebook and Twitter uses them.
It uses key-value pair unlike SQL which use tables, and it's schema is dynamic unlike SQL which is fixed.
but SQL is used for complex databases unlike noSQL and it's a mix of open source on the contrary noSQL is an open source.
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