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Oracle Database 23ai SQL Associate Sample Questions:

1. How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?

A) LOCALTIMESTAMP does not include fractional seconds, while CURRENT_TIMESTAMP does.
B) LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.
C) LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.
D) Both functions are identical in output.

2. Which SET operator returns rows from the first query that are not present in the second query?

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

3. Which type of subquery returns exactly one value?

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

4. Which of the following is an example of an object privilege?

A) SELECT ON table_name
B) CREATE TABLE
C) ALTER USER
D) DROP DATABASE

5. Which of the following is a valid reason to create a synonym?

A) To automatically generate numeric values for a column
B) To improve query performance
C) To provide simplified and consistent access to an object
D) To enforce unique constraints on a table

Solutions: