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Oracle Database 23ai SQL Associate Sample Questions:

1. What will the following SQL query do?
UPDATE employees
SET salary = salary * 1.1
WHERE department_id = 10;

A) Decrease the salary of employees in department 10 by 10%
B) Set the salary to 1.1 for employees in department 10
C) Increase the salary of employees in department 10 by 10%
D) Increase the salary of all employees by 10%

2. Which SQL clause can be used in Oracle to limit the number of rows returned?

A) WHERE
B) FETCH FIRST n ROWS ONLY
C) DISTINCT
D) GROUP BY

3. What does the INTERSECT operator do in SQL?

A) Combines rows from two queries and includes all duplicates
B) Combines all rows from two queries without any conditions
C) Returns rows from the first query that are not present in the second query
D) Returns rows that are present in both queries

4. Which of the following is true about foreign key constraints in SQL?

A) They define a relationship between two tables.
B) They enforce the uniqueness of values in a column.
C) They ensure that a column only contains NULL values.

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

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

Solutions: