This task aims to provide practical experience with fundamental SQL Data Manipulation Language (DML) commands, including INSERT, UPDATE, and DELETE. It also focuses on the proper handling of NULL ...

A null represents missing or unknown information at the column level. A null is not the same as 0 (zero) or blank. Null means “no entry”, means “has been made for the column” and it implies that the ...

Literals in SQL are fixed values that are directly written into the query. These values represent data in a constant form and can be of different types, such as numbers, strings, or dates. For example ...