Interacting with the database to manage your data. While the database system takes care of how to store data on disk or in-memory, it also provides an interface for users or applications. 

According to Wikipedia, databases typically allow the following four types of interaction:

Data definition: Create, modify, and delete definitions of the structure of the data. These operations change the properties that affect how the database accepts and stores data. 

Update: Insert, modify, and delete data in the database. These operations change the actual data being managed.

Retrieval: Provide access to stored data. Data can be retrieved as it is or often can be filtered or transformed to turn it into a more useful format. Many database systems understand rich query languages ​​to achieve this.

Administration: Other tasks such as user management, security, performance monitoring, etc.

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https://community.wongcw.com/blogs/824162/What-is-a-database
https://truxgo.net/blogs/466560/1604698/what-types-of-information-are-stored-in-databases
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