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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What does the INTERSECT operator do in SQL?

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

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

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

3. Which type of subquery returns exactly one value?

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

4. What is the purpose of a correlated subquery?

A) A subquery that can be used only with aggregate functions
B) A subquery that references columns from the outer query
C) A subquery that depends on the result of another subquery
D) A subquery that combines data from multiple tables

5. What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;

A) Only the first names of employees
B) Concatenated first and last names with spaces in between
C) A syntax error
D) Concatenated first and last names without spaces

Solutions: