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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Operator precedence rules - Limiting rows and substitution variables - Sorting query results |
| Topic 2: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - TRUNCATE TABLE statement - Temporary and external tables - Drop columns, set unused columns - Views management - Constraints management - Table structure, columns, data types |
| Topic 3: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Topic 4: Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 5: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 6: Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Topic 7: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 8: Using Functions | 25% | - Group functions and grouping data - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Restricting group results - Date arithmetic and date functions - Character functions for string manipulation - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions |
| Topic 9: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Topic 10: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 11: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
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NEW QUESTION # 94
What does the following SQL query return?
SELECT employee_id, salary * 12 AS annual_salary FROM employees;
Answer: A
NEW QUESTION # 95
What happens if a privilege is revoked from a user who has granted the same privilege to others?
Answer: D
NEW QUESTION # 96
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: C
NEW QUESTION # 97
What will the following query do?
SELECT employee_id, salary
FROM employees
WHERE salary > (SELECT AVG(salary) FROM employees);
Answer: A
NEW QUESTION # 98
What is a SELF JOIN in SQL?
Answer: C
NEW QUESTION # 99
......
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