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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 2: DDL for Tables and Relationships | 15% | - Constraints management - Drop columns, set unused columns - CREATE TABLE statement - Temporary and external tables - Views management - Table structure, columns, data types - TRUNCATE TABLE statement |
| Topic 3: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Topic 4: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 5: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Topic 6: Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Limiting rows and substitution variables - Operator precedence rules |
| Topic 7: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Topic 8: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Topic 9: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 10: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 11: Using Functions | 25% | - NVL, NULLIF, COALESCE functions - Group functions and grouping data - ROUND, TRUNC, MOD functions - Character functions for string manipulation - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - Data type conversion: implicit and explicit - Restricting group results |
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NEW QUESTION # 97
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
Answer: D
NEW QUESTION # 98
Which function returns the current system date and time in the database session's time zone?
Answer: B
NEW QUESTION # 99
Which of the following statements is true about constraints in Oracle Database?
Answer: D
NEW QUESTION # 100
What is the purpose of a correlated subquery?
Answer: D
NEW QUESTION # 101
What does the EXISTS operator check in a subquery?
Answer: A
NEW QUESTION # 102
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