Key-value databases and document databases are quite similar. Key-value databases are the simplest of the NoSQL databases: The basic data structure is a dictionary or map. You can store a value, such as an integer, string, a JSON structure, or an array, along with a key used to reference that value read more
Relational databases can only store data in tabular form which makes it difficult to represent complex
relationships between objects.
This is an issue because many applications require more than one table
to
store all the necessary data required by their application logic.
obtaining work, information, or opinions from a large group of people who submit their data via the Internet, social media, and smartphone apps read more
