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Oracle Database 23ai SQL Associate Sample Questions:

1. Which of the following SET operators combines results from two queries and removes duplicates?

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

2. Which of the following statements creates an ascending sequence starting at 100 and incrementing by 10?

A) CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY -100;
B) CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY 100;
C) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY 10;
D) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY -10;

3. Which of the following is true about foreign key constraints in SQL?

A) They define a relationship between two tables.
B) They enforce the uniqueness of values in a column.
C) They ensure that a column only contains NULL values.

4. Which Oracle SQL function returns the current date and time, including time zone information?

A) SYSDATE
B) NOW
C) CURRENT_TIMESTAMP
D) CURRENT_DATE

5. Which INTERVAL data type would you use to store a period of time in years and months?

A) INTERVAL MINUTE TO HOUR
B) INTERVAL YEAR TO MONTH
C) INTERVAL MONTH TO DAY
D) INTERVAL DAY TO SECOND

Solutions: