R is a language and environment for statistical programming which includes statistical computing and graphics.
Python is a general purpose programming language for data analysis, scientific computing, web development, application development etc.
In MongoDB, each individual records are stored as ‘documents’.
In MySQL, each individual records are stored as ‘rows’ in a table.
Documents belonging to a particular class or group asstored in a ‘collection’.
A ‘table’ is used to store rows (records) of similar type.
MongoDB was designed with high availability and scalability in mind.
MySQL one can access associated data using joins that low duplication.
MongoDB stores data in form of JSON-like documents.
MySQL stores data in form of rows of table as mentioned earlier.