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  4. Oracle.1Z0-171.v2026-07-20.q53 Practice Test (Page 6)

1Z0-171 Exam Question 21

What is a subquery in SQL?

    • 1Z0-171 Exam Question 22

    Which SQL keyword is used to define a substitution variable in a SQL statement?

    • 1Z0-171 Exam Question 23

    Which type of join includes rows that do not have matching values in the joined table?

    • 1Z0-171 Exam Question 24

    Which SQL statement is used to create a table?

    • 1Z0-171 Exam Question 25

    Which SQL function can be used to replace NULL values with a specified value?
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