Author: Anonymous

Which outcome follows from this sequence?UPDATE t SET x = x + 1 WHERE id = 5;SAVEPOINT p1;UPDATE t SET x = x + 1 WHERE id = 5;ROLLBACK TO p1;COMMIT;

Which pattern best describes pessimistic concurrency control?

What is the effect of COUNT(column_name) compared to COUNT(*)?

Which query correctly returns the current database date/time as demonstrated by Oracle examples?

Why is relying on the application layer to detect duplicates risky when inserting new records under concurrency?

SQL standards such as ANSI and ISO matter primarily because:

Which statement correctly distinguishes UNION from UNION ALL?

Which statement best describes the primary role of a SELECT command in SQL?

Which scenario is a Non-repeatable Read?

What best characterizes a database transaction in this class?