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Oracle Database 23ai SQL Associate Sample Questions:

1. Which of the following data dictionary views provides information about constraints on tables?

A) ALL_CONSTRAINTS
B) DBA_CONSTRAINTS
C) USER_CONSTRAINTS
D) All of the above

2. Which type of join returns all rows from the left table, even if there are no matches in the right table?

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

3. Which type of subquery returns exactly one value?

A) Correlated subquery
B) Scalar subquery
C) Multiple-row subquery
D) Inline view

4. What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;

A) Department IDs that exist only in the employees table
B) All department IDs from the employees table
C) Department IDs that exist in both the departments and employees tables
D) All department IDs from the departments table

5. Which SQL function converts a string representation of a date into a date data type?

A) TO_DATE
B) CAST_TO_DATE
C) CONVERT_TO_DATE
D) DATE_CONVERT

Solutions: