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Oracle Database 23ai SQL Associate Sample Questions:

1. Which statement can be used to undo changes made in a transaction?

A) COMMIT
B) SAVEPOINT
C) ROLLBACK
D) MERGE

2. What will the following query do?
DELETE FROM employees
WHERE department_id = 20;

A) Delete all rows where department_id is 20
B) Raise an error because DELETE cannot use a WHERE clause
C) Delete the department_id column in the employees table
D) Delete all rows in the employees table

3. Which of the following ensures that a relational database enforces data integrity?

A) Constraints such as primary keys, foreign keys, and unique constraints
B) Indexes on all columns
C) Redundant data storage
D) Hierarchical data organization

4. How can you ensure that data is sorted in descending order in a SQL query?

A) Use the DESC keyword
B) Use the ORDER keyword
C) Use the DISTINCT keyword
D) Use the ASC keyword

5. What happens when a temporary table is created in Oracle Database?

A) It is permanently stored in the database.
B) It is stored in external files.
C) It is created for the duration of a user session or transaction.
D) It cannot have any constraints.

Solutions: