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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 2: Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Topic 3: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Topic 4: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 5: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Topic 6: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - TRUNCATE TABLE statement - Views management - CREATE TABLE statement - Constraints management - Drop columns, set unused columns - Temporary and external tables |
| Topic 7: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Topic 8: Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 9: Using Functions | 25% | - Character functions for string manipulation - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Group functions and grouping data - Data type conversion: implicit and explicit - Date arithmetic and date functions - Nested functions - NVL, NULLIF, COALESCE functions |
| Topic 10: Retrieving and Sorting Data | 15% | - Operator precedence rules - Arithmetic expressions and NULL values - Sorting query results - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword |
| Topic 11: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
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NEW QUESTION # 39
What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;
Answer: D
NEW QUESTION # 40
Which function returns the current system date and time in the database session's time zone?
Answer: A
NEW QUESTION # 41
What is the result of the following query?
SELECT employee_id
FROM employees
WHERE EXISTS (SELECT 1 FROM departments WHERE department_id = 10);
Answer: C
NEW QUESTION # 42
Which of the following statements is true about constraints in Oracle Database?
Answer: A
NEW QUESTION # 43
Which data dictionary view lists all indexes created by the current user?
Answer: A
NEW QUESTION # 44
......
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