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Oracle Database 23ai SQL Associate Sample Questions:

1. What is a SELF JOIN in SQL?

A) A join that does not require a WHERE clause
B) A join used for Cartesian products
C) A join of a table with itself
D) A join between tables with identical structures

2. What is the difference between UNION and UNION ALL?

A) UNION includes all rows, while UNION ALL removes duplicates.
B) UNION works with subqueries, while UNION ALL does not.
C) UNION combines columns, while UNION ALL combines rows.
D) UNION removes duplicates, while UNION ALL includes all rows, including duplicates.

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

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

4. Which of the following SQL commands retrieves data from a relational database?

A) SELECT
B) DELETE
C) UPDATE
D) INSERT

5. Which SQL function converts a string representation of a date into a date data type?

A) TO_DATE
B) DATE_CONVERT
C) CAST_TO_DATE
D) CONVERT_TO_DATE

Solutions: