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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Topic 2: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 3: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - Constraints management - Drop columns, set unused columns - Views management - TRUNCATE TABLE statement - Temporary and external tables - CREATE TABLE statement |
| Topic 4: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Topic 5: Retrieving and Sorting Data | 15% | - Sorting query results - Operator precedence rules - Limiting rows and substitution variables - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases |
| Topic 6: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Topic 7: Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Topic 8: Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Topic 9: Using Functions | 25% | - Restricting group results - Character functions for string manipulation - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Nested functions - Date arithmetic and date functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions |
| Topic 10: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 11: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
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NEW QUESTION # 44
What is the purpose of the MERGE statement in SQL?
Answer: D
NEW QUESTION # 45
Which command grants a user the ability to query data from a specific table?
Answer: D
NEW QUESTION # 46
What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;
Answer: B
NEW QUESTION # 47
What is the result of the following query?
SELECT employee_id
FROM employees
WHERE EXISTS (SELECT 1 FROM departments WHERE department_id = 10);
Answer: B
NEW QUESTION # 48
Which of the following data dictionary views provides information about constraints on tables?
Answer: D
NEW QUESTION # 49
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