What is the origin / meaning of the icon used for database?

1. Where does the database icon come from?
2. What does a database icon represent?
3. What is an icon person?

Where does the database icon come from?

It's because people view a DB as simple storage, much like a disk. And disk storage has always been represented by a cylinder due to, well, the physical properties of spinning magnetic disks.

What does a database icon represent?

A database icon helps users identify the database quickly on their Bookmark pane. An icon visually represents the purpose of the database. For example, a discussion database where users ask questions about new products could include an icon with a question mark.

What is an icon person?

: a person or thing widely admired especially for having great influence or significance in a particular sphere. a civil rights icon. an actor and fashion icon.