Table of contents
Definition
A database is a collection of information that has been structured for easy access, administration, and updating.
Databases are designed to make it easy to store, retrieve, modify, and delete data, among other data-processing activities.
Use Cases and Examples
In software development, a developer interacts with the database using a particular language known as a query language. Popular examples include SQL and MQL.
Databases are of many types. Most categorization is based on how the data is structured and stored.
Here are a few examples:
Relational database: Uses the concepts of tables to store data. Each table comprises columns and rows. A relationship can be formed between tables as well. No SQL database: Relational databases require that the table structure be defined before storing any data. No SQL databases do not require a structure to be defined before use. It's up to the developer to maintain the data structure.
Graph database: They use graph theory techniques to store, map, and query relationships. Nodes and edges are the building blocks of graph databases. The main point of such a database is to create useful links between the data stored. This is good for applications where the discovery of relationships is essential. For example, social network applications.
Summary
Databases are key to any software application that needs to store, retrieve and work with data in any way.
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