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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Using DML Statements | - Use the MERGE statement - Insert rows into a table - Update rows in a table - Delete rows from a table - Control transactions |
| Using Set Operators | - Use UNION, UNION ALL, INTERSECT, and MINUS operators |
| Using SELECT Statements | - Execute a basic SELECT statement - Use the ORDER BY clause to sort rows - Use the WHERE clause to restrict rows - Use the FETCH clause to limit rows returned |
| Using Joins | - Use cross joins - Use outer joins (LEFT, RIGHT, FULL) - Use self-joins - Use equijoins and non-equijoins |
| Using SQL Functions | - Use conversion functions - Use character, number, and date functions in SELECT statements |
| Using DDL Statements | - Create and manage views - Create and manage indexes - Create and manage sequences - Create and manage constraints - Create and manage tables |
| Using Subqueries | - Use multiple-row subqueries - Use correlated subqueries - Use single-row subqueries |
| Controlling User Access | - Grant and revoke privileges - Create and manage roles - Differentiate system privileges from object privileges |
Oracle Database 23ai SQL Associate Sample Questions:
What will the following query do?
SELECT employee_id, salary
FROM employees
WHERE salary > (SELECT AVG(salary) FROM employees);
- A. Return all employees and their salaries
- B. Return employees with a salary equal to the average salary
- C. Return employees with a salary below the average salary
- D. Return employees with a salary above the average salary
Correct Answer: D 🗳️
What is the default order of evaluation when multiple SET operators are used in a query?
- A. INTERSECT, UNION, MINUS
- B. UNION, MINUS, INTERSECT
- C. INTERSECT, MINUS, UNION
- D. UNION, INTERSECT, MINUS
Correct Answer: A 🗳️
What does the following SQL query return?
SELECT employee_id, salary * 12 AS annual_salary FROM employees;
- A. Only employees with salaries greater than 12
- B. Monthly salaries of all employees
- C. Employee IDs and their annual salaries
- D. Salaries multiplied by 12 and stored in a new table
Correct Answer: C 🗳️
Which function is used to extract the year from a date in SQL?
- A. TO_YEAR(date)
- B. YEAR(date)
- C. EXTRACT(YEAR FROM date)
- D. GET_YEAR(date)
Correct Answer: C 🗳️
What does the UNION ALL operation do when selecting matching columns from different tables?
SELECT employee_id, salary FROM employees
UNION ALL
SELECT employee_id, bonus FROM bonuses;
- A. Combines the salaries and bonuses for employees, removing duplicates
- B. Returns only employees with duplicate employee IDs in both tables
- C. Returns only the employees with salaries and bonuses
- D. Combines all employee IDs, salaries, and bonuses, including duplicates
Correct Answer: D 🗳️
