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Oracle Database 23ai SQL Associate Sample Questions:

1. Which command would drop an index from a table?

A) TRUNCATE INDEX
B) DROP INDEX
C) REMOVE INDEX
D) DELETE INDEX

2. Which clause is used to ensure that only specific rows are deleted in a DELETE statement?

A) SET
B) WHERE
C) HAVING
D) FROM

3. Which SQL keyword is used to remove duplicate rows from the result set of a query?

A) DISTINCTROW
B) ONLY
C) DISTINCT
D) UNIQUE

4. In a relational database, what is a foreign key?

A) A key that is used to establish a relationship between two tables
B) A unique identifier for a record in a table
C) A key used to sort data in a specific order
D) A temporary key generated during query execution

5. What does the EXISTS operator check in a subquery?

A) If the subquery references the outer query
B) If the subquery returns a specific number of rows
C) If the subquery contains only unique values
D) If the subquery returns any rows

Solutions: