What is difference between Database and relational Database?

What is the difference between SQL and relational database?

The terms are used interchangeably, but there are differences. SQL is the query language that is used with relational databases. Relational databases and their management systems almost always use SQL as their underlying query language. NoSQL, or not only SQL, databases use SQL and other query languages.

What is difference between relational database and NoSQL?

Relational databases are table-based. NoSQL databases can be document based, graph databases, key-value pairs, or wide-column stores. Relational databases were built during a time that data was mostly structured and clearly defined by their relationships. Today, we know that data today is much more complex.