Final answer:
The three fundamental SQL Transaction commands are BEGIN TRANSACTION, COMMIT, and ROLLBACK. They are used to start a transaction, save changes permanently, and undo changes in a transaction, respectively.
Step-by-step explanation:
The three SQL Transaction commands that are essential to remember are:
BEGIN TRANSACTION: This command initiates a new transaction.
COMMIT: This command saves the changes made during the transaction into the database permanently.
ROLLBACK: This command undoes all the changes made in the current transaction, reverting the database to its previous state before the BEGIN TRANSACTION was issued.
These commands play a crucial role in ensuring that a set of SQL operations are executed as a single unit, maintaining data integrity and consistency within the database.