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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Using DML Statements | - Control transactions - Delete rows from a table - Use the MERGE statement - Update rows in a table - Insert rows into a table |
| Using SQL Functions | - Use conversion functions - Use character, number, and date functions in SELECT statements |
| Using Subqueries | - Use correlated subqueries - Use multiple-row subqueries - Use single-row subqueries |
| Controlling User Access | - Differentiate system privileges from object privileges - Create and manage roles - Grant and revoke privileges |
| Using SELECT Statements | - Use the FETCH clause to limit rows returned - Use the ORDER BY clause to sort rows - Execute a basic SELECT statement - Use the WHERE clause to restrict rows |
| Using Joins | - Use self-joins - Use equijoins and non-equijoins - Use cross joins - Use outer joins (LEFT, RIGHT, FULL) |
| Using Set Operators | - Use UNION, UNION ALL, INTERSECT, and MINUS operators |
| Using DDL Statements | - Create and manage sequences - Create and manage tables - Create and manage constraints - Create and manage indexes - Create and manage views |
Oracle Database 23ai SQL Associate Sample Questions:
How are NULL values treated in relational databases?
- A. NULL values are not allowed in relational databases.
- B. NULL values are treated as zero.
- C. NULL values represent missing or unknown data.
- D. NULL values are treated as empty strings.
Correct Answer: C 🗳️
Which statement can be used to undo changes made in a transaction?
- A. COMMIT
- B. MERGE
- C. SAVEPOINT
- D. ROLLBACK
Correct Answer: D 🗳️
What does the following query return?
SELECT employee_id
FROM employees
WHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);
- A. Employees with no department
- B. Employees working in location ID 1000
- C. Departments located in location ID 1000
- D. Employees with salaries greater than 1000
Correct Answer: B 🗳️
What is the result of the following SQL query?
SELECT COALESCE(NULL, 100, 200) AS result FROM dual;
- A. NULL
- B. 300
- C. 100
- D. 200
Correct Answer: C 🗳️
Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
- A. SET
- B. FROM
- C. HAVING
- D. WHERE
Correct Answer: A 🗳️
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