In databases, a function is defined as?

In databases, a function is defined as?

• A. A block of code that runs a set number of times.
• B. A form of automatic memory management that frees up memory when it is no longer needed.
• C. In the context of databases, a block of code used to return the result of a calculation on data.
• D. Hypertext Markup Language for webpage display.

Answer: (C)

A function in databases is a block of code that takes input values, performs a calculation or transformation on data, and returns a result that you can use in queries. This lets you encapsulate computations so you can reuse them across statements, for example calculating a discounted price, formatting a string, or converting data types within a SELECT or WHERE clause. It’s about producing a value from data, not about looping, managing memory, or displaying web content.

A function in databases is a block of code that takes input values, performs a calculation or transformation on data, and returns a result that you can use in queries. This lets you encapsulate computations so you can reuse them across statements, for example calculating a discounted price, formatting a string, or converting data types within a SELECT or WHERE clause. It’s about producing a value from data, not about looping, managing memory, or displaying web content.