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| Section | Objectives |
|---|---|
| Topic 1: Using SELECT Statements | - Execute a basic SELECT statement - Use the ORDER BY clause to sort rows - Use the FETCH clause to limit rows returned - Use the WHERE clause to restrict rows |
| Topic 2: Using Set Operators | - Use UNION, UNION ALL, INTERSECT, and MINUS operators |
| Topic 3: Using Joins | - Use outer joins (LEFT, RIGHT, FULL) - Use equijoins and non-equijoins - Use self-joins - Use cross joins |
| Topic 4: Using SQL Functions | - Use character, number, and date functions in SELECT statements - Use conversion functions |
| Topic 5: Using DDL Statements | - Create and manage tables - Create and manage constraints - Create and manage views - Create and manage sequences - Create and manage indexes |
| Topic 6: Controlling User Access | - Create and manage roles - Differentiate system privileges from object privileges - Grant and revoke privileges |
| Topic 7: Using DML Statements | - Delete rows from a table - Insert rows into a table - Update rows in a table - Control transactions - Use the MERGE statement |
| Topic 8: Using Subqueries | - Use multiple-row subqueries - Use correlated subqueries - Use single-row subqueries |
1. Which type of join includes rows that do not have matching values in the joined table?
A) INNER JOIN
B) OUTER JOIN
C) CROSS JOIN
D) SELF JOIN
2. 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 working in location ID 1000
B) Employees with no department
C) Employees with salaries greater than 1000
D) Departments located in location ID 1000
3. Which statement can be used to undo changes made in a transaction?
A) ROLLBACK
B) MERGE
C) SAVEPOINT
D) COMMIT
4. What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;
A) Lists employees and their corresponding managers
B) Lists employees who are not managers
C) Lists employees who are managers
D) Lists employees without departments
5. Which function is used to extract the year from a date in SQL?
A) TO_YEAR(date)
B) EXTRACT(YEAR FROM date)
C) GET_YEAR(date)
D) YEAR(date)
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: A | Question # 4 Answer: A | Question # 5 Answer: B |
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