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Oracle 1Z1-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What does the INTERSECT operator do in SQL?

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

2. What is the default order of evaluation when multiple SET operators are used in a query?

A) INTERSECT, UNION, MINUS
B) UNION, MINUS, INTERSECT
C) UNION, INTERSECT, MINUS
D) INTERSECT, MINUS, UNION

3. What does a Cartesian product in SQL result from?

A) An OUTER JOIN with NULL values
B) A NATURAL JOIN without specifying join conditions
C) An INNER JOIN without specifying join conditions

4. What is the purpose of a correlated subquery?

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

5. What will the following SQL query return?
SELECT TRUNC(15.678, 2) AS truncated_value FROM dual;

A) 15.67
B) 15.68
C) 15.678
D) 15.6

Solutions: