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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: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 3: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 4: DDL for Tables and Relationships | 15% | - Temporary and external tables - Drop columns, set unused columns - TRUNCATE TABLE statement - Views management - CREATE TABLE statement - Constraints management - Table structure, columns, data types |
| Topic 5: Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Topic 6: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Topic 7: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Topic 8: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 9: Using Functions | 25% | - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Nested functions - Group functions and grouping data - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions - Restricting group results - Date arithmetic and date functions |
| Topic 10: Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Arithmetic expressions and NULL values - Operator precedence rules - DEFINE and VERIFY commands - Sorting query results - Using SELECT statement and column aliases |
| Topic 11: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
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NEW QUESTION # 81
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 # 82
What does the following command do?
GRANT CREATE SESSION TO user_name;
Answer: B
NEW QUESTION # 83
What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;
Answer: A
NEW QUESTION # 84
How does SQL handle NULL values in arithmetic expressions?
Answer: A
NEW QUESTION # 85
What happens if a privilege is revoked from a user who has granted the same privilege to others?
Answer: A
NEW QUESTION # 86
......
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