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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What is required for the queries combined by a SET operator to work correctly?

A) The tables must be joined using a primary key.
B) Both queries must use the GROUP BY clause.
C) Both queries must include the WHERE clause.
D) The result sets must have the same number of columns and compatible data types.

2. Which function is used to convert a string to uppercase in SQL?

A) CONVERT_UPPER
B) TO_UPPERCASE
C) UPPER
D) CASE_UPPER

3. How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?

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

4. What does the following SQL statement do?
CREATE TABLE employees (
employee_id NUMBER PRIMARY KEY,
first_name VARCHAR2(50),
hire_date DATE NOT NULL
);

A) Creates a table with a primary key and a NOT NULL constraint
B) Creates a temporary table
C) Creates a table with no constraints
D) Creates a table with only VARCHAR2 and DATE columns

5. What does the NEXTVAL pseudocolumn do in SQL?

A) Retrieves the current value of a sequence without incrementing it
B) Deletes the sequence from the database
C) Retrieves the next value in a sequence and increments the sequence
D) Resets the sequence to its starting value

Solutions: