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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving and Sorting Data | 15% | - Operator precedence rules - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Sorting query results - DEFINE and VERIFY commands - Arithmetic expressions and NULL values |
| Topic 2: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 3: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Topic 4: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 5: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 6: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Topic 7: DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - Views management - Table structure, columns, data types - TRUNCATE TABLE statement - Temporary and external tables - Constraints management - CREATE TABLE statement |
| Topic 8: Using Functions | 25% | - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Data type conversion: implicit and explicit - Restricting group results - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - Character functions for string manipulation |
| Topic 9: Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 10: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Topic 11: Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
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NEW QUESTION # 50
Which SQL clause can be used in Oracle to limit the number of rows returned?
Answer: B
NEW QUESTION # 51
What is the result of using the following SQL query?
SELECT 100 + NULL AS result;
Answer: B
NEW QUESTION # 52
What is the primary purpose of granting privileges in Oracle Database?
Answer: D
NEW QUESTION # 53
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
Answer: A
NEW QUESTION # 54
What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;
Answer: B
NEW QUESTION # 55
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