In SQL administration (e.g., Oracle-style systems), what can the ALTER TABLESPACE command accomplish for a tablespace under management?

Introduction / Context:
DBAs routinely administer tablespaces, which group data files and manage storage parameters. The SQL command set for tablespace operations includes altering file lists, tuning storage, controlling availability, and coordinating backups. Understanding what ALTER TABLESPACE can do is essential for safe maintenance routines and high availability.

Given Data / Assumptions:

• The context aligns with systems where tablespaces are first-class (e.g., Oracle).
• DBA tasks include storage tuning, availability toggling, and backup coordination.
• The command in question is ALTER TABLESPACE.

Concept / Approach:
ALTER TABLESPACE supports multiple administrative actions: adding/renaming data files for capacity management, adjusting storage attributes (e.g., extent sizes), placing a tablespace online/offline, and placing it in backup mode or ending that mode to coordinate with file system backups. Collectively, these cover the presented options, making “All of the above” correct in such environments.

Step-by-Step Solution:

Verification / Alternative check:
DBA reference manuals show ALTER TABLESPACE clauses for data file management, storage parameters, online/offline, and backup mode, validating the inclusive choice.

Why Other Options Are Wrong:
Each single option is true but incomplete; the question asks what the command can accomplish overall, hence “All of the above.”

Common Pitfalls:
Confusing table-level ALTER TABLE with tablespace-level operations; overlooking backup mode management at the tablespace level.

Final Answer:
All of the above