$1.$ What is the primary purpose of a database?

$2.$ What is the most common database?

$3.$ What are the main characteristics of a relational database?

$4.$ What is a database management system and what does it do$?$

$5.$ How does DIKW pyramid explain the power of data at various stages?

$6.$ What is the most common database language?

$7.$ What are the main components of a two$-$dimensional relational database?

$8.$ What is Big Data and why is Big Data critical in digital transformations?

$9.$ What are relationship keys and how are they used in a database?