I know this is off topic but could you help me in this following questions cause I don't have a clue on what they mean! Thanks!

What important, basic function do all databases serve?
Explain the use of records and fields within a database.
What is a primary key, and how is it used?
In relation to a database, what function does SQL serve?

What important, basic function do all databases serve?
The centralization of data storage.

Explain the use of records and fields within a database.
Records are instances of an entity. Fields are the attributes of an entity.

What is a primary key, and how is it used?
The primary key is one or more attributes that uniquely identify a row.

In relation to a database, what function does SQL serve?
SQL enables the Querying and Manipulation of data in a database.

What purpose does doing your homework yourself serve?