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Oracle 1Z1-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;

A) The current date in the format 'DD-MM-YYYY'
B) The current date in the default system format
C) The time part of the current date
D) An error

2. What does the INTERSECT operator do in SQL?

A) Returns rows from the first query that are not present in the second query
B) Returns rows that are present in both queries
C) Combines rows from two queries and includes all duplicates
D) Combines all rows from two queries without any conditions

3. Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?

A) RIGHT
B) CROSS
C) FULL OUTER JOIN
D) LEFT

4. What happens if a DELETE statement is executed without a WHERE clause?

A) An error is raised.
B) Only the first row is deleted.
C) All rows in the table are deleted.
D) No rows are deleted.

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

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

Solutions: