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Oracle Database 23ai SQL Associate Sample Questions:

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

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

2. How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?

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

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

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

4. Which SQL clause can be used in Oracle to limit the number of rows returned?

A) GROUP BY
B) DISTINCT
C) WHERE
D) FETCH FIRST n ROWS ONLY

5. Which of the following statements is true about constraints in Oracle Database?

A) Constraints are automatically dropped when rows are deleted.
B) Constraints cannot reference other tables.
C) Constraints can only be added when creating a table.
D) Constraints can be added or modified using the ALTER TABLE statement.

Solutions: