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Oracle Database 23ai SQL Associate Sample Questions:

1. What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;

A) The time part of the current date
B) An error
C) The current date in the format 'DD-MM-YYYY'
D) The current date in the default system format

2. Which type of join includes rows that do not have matching values in the joined table?

A) SELF JOIN
B) INNER JOIN
C) OUTER JOIN
D) CROSS JOIN

3. What happens when the TRUNCATE TABLE statement is executed?

A) Deletes only the last row in the table
B) Deletes the table structure permanently
C) Deletes all rows in the table and logs the operation for rollback
D) Deletes all rows in the table without logging the operation for rollback

4. Which command grants a user the ability to query data from a specific table?

A) GRANT ALL ON table_name TO user_name;
B) ALLOW SELECT ON table_name TO user_name;
C) ENABLE SELECT ON table_name TO user_name;
D) GRANT SELECT ON table_name TO user_name;

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

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

Solutions: