Which SQL command is used to modify the structure of an existing table? MCQ with Answer and Explanation

Explanation:
Data refers to raw, unorganized, and unprocessed facts, figures, or symbols that do not convey a specific meaning on their own. When data is processed and organized, it becomes information.

Explanation:
The Internal (or Physical) level of the three-schema architecture describes the physical storage structure and access paths of the database.

Explanation:
A DBMS provides functionalities for defining, constructing, manipulating, and controlling access to databases.