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Oracle Database 23ai SQL Associate Sample Questions:

1. Which of the following statements is true about constraints in Oracle Database?

A) Constraints can only be added when creating a table.
B) Constraints cannot reference other tables.
C) Constraints are automatically dropped when rows are deleted.
D) Constraints can be added or modified using the ALTER TABLE statement.

2. Which of the following can be achieved using a correlated subquery?

A) Comparing each employee's salary to the average salary of their department
B) Joining two tables without a common column
C) Retrieving duplicate records from a single table
D) Inserting data into a table

3. Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?

A) LEFT
B) RIGHT
C) CROSS
D) FULL OUTER JOIN

4. What type of join does the following query perform?
SELECT *
FROM employees e, departments d
WHERE e.department_id = d.department_id;

A) OUTER JOIN
B) NATURAL JOIN
C) EQUI JOIN
D) CROSS JOIN

5. Which clause is used to allow a user to grant a privilege to others?

A) WITH GRANT OPTION
B) WITH SELECT OPTION
C) WITH SHARE OPTION
D) WITH ADMIN OPTION

Solutions: