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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 2: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 3: DDL for Tables and Relationships | 15% | - Temporary and external tables - Views management - Drop columns, set unused columns - TRUNCATE TABLE statement - Table structure, columns, data types - CREATE TABLE statement - Constraints management |
| Topic 4: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Topic 5: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 6: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| 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: Using Functions | 25% | - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Date arithmetic and date functions - Character functions for string manipulation - Data type conversion: implicit and explicit - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Group functions and grouping data |
| Topic 9: Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Sorting query results - Arithmetic expressions and NULL values - Operator precedence rules |
| Topic 10: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| 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 # 98
What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;
Answer: D
NEW QUESTION # 99
What does the following command do?
GRANT CREATE SESSION TO user_name;
Answer: D
NEW QUESTION # 100
Which of the following statements is true about constraints in Oracle Database?
Answer: B
NEW QUESTION # 101
What is a sequence in Oracle Database?
Answer: A
NEW QUESTION # 102
What does the following query return?
SELECT employee_id
FROM employees
WHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);
Answer: C
NEW QUESTION # 103
......
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