Check out example codes for "sql vs nosql". It will help you in understanding the concepts better.
Code Example 1
A SQL Database follows a table like structure which can have an unlimited number of rows and every data present inside the database is properly structured with Predefined Schemas, it is basically used to manipulate Relational Databases Management Systems. A NoSQL Database is a Distributed Database where the data is very unstructured with Dynamic Schema. Unlike SQL it cannot have unlimited rows but it follows a Standard Schema Definition and can store all sorts of data models with large distributed data in the form of key-value pairs, graph databases, documents or wide-column stores.
Code Example 2
/* KEY DIFFERENCE SQL pronounced as "S-Q-L" or as "See-Quel" is primarily called RDBMS or Relational Databases whereas NoSQL is a Non-relational or Distributed Database. SQL databases are table based databases whereas NoSQL databases can be document based, key-value pairs, graph databases. SQL databases are vertically scalable while NoSQL databases are horizontally scalable. SQL databases have a predefined schema whereas NoSQL databases use dynamic schema for unstructured data. SQL requires specialized DB hardware for better performance while NoSQL uses commodity hardware.*/
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