What is a self join? MCQ with Answer and Explanation

Explanation:
A Relation Instance is the specific collection of data rows (tuples) present in a table at a given moment. It changes frequently as data is modified.

Explanation:
The ORDER BY clause is used to sort the result set of a query in either ascending (default) or descending (using DESC) order.

Explanation:
Executing a COMMIT statement instructs the database engine to save all data updates performed during the transaction permanently into physical storage.