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| Section | Objectives |
|---|---|
| Topic 1: Using DDL Statements | - Create and manage sequences - Create and manage indexes - Create and manage constraints - Create and manage views - Create and manage tables |
| Topic 2: Using Joins | - Use self-joins - Use cross joins - Use equijoins and non-equijoins - Use outer joins (LEFT, RIGHT, FULL) |
| Topic 3: Using SELECT Statements | - Use the FETCH clause to limit rows returned - Execute a basic SELECT statement - Use the WHERE clause to restrict rows - Use the ORDER BY clause to sort rows |
| Topic 4: Using DML Statements | - Update rows in a table - Delete rows from a table - Use the MERGE statement - Control transactions - Insert rows into a table |
| Topic 5: Using Subqueries | - Use single-row subqueries - Use multiple-row subqueries - Use correlated subqueries |
| Topic 6: Controlling User Access | - Differentiate system privileges from object privileges - Grant and revoke privileges - Create and manage roles |
| Topic 7: Using Set Operators | - Use UNION, UNION ALL, INTERSECT, and MINUS operators |
| Topic 8: Using SQL Functions | - Use conversion functions - Use character, number, and date functions in SELECT statements |
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NEW QUESTION # 24
Which of the following SQL commands retrieves data from a relational database?
Answer: A
NEW QUESTION # 25
What does the following SQL statement do?
SELECT e.employee_id, d.department_name
FROM employees e
JOIN departments d ON e.department_id = d.department_id;
Answer: D
NEW QUESTION # 26
What does the INTERSECT operator do in SQL?
Answer: D
NEW QUESTION # 27
Which data dictionary view provides information about all tables accessible to the current user?
Answer: A
NEW QUESTION # 28
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;
Answer: D
NEW QUESTION # 29
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