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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Topic 2: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Topic 3: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Topic 4: Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Topic 5: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Operator precedence rules - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Sorting query results |
| Topic 6: Using Functions | 25% | - Date arithmetic and date functions - Group functions and grouping data - Data type conversion: implicit and explicit - Nested functions - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions |
| Topic 7: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 8: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Temporary and external tables - TRUNCATE TABLE statement - Table structure, columns, data types - Drop columns, set unused columns - Views management - Constraints management |
| Topic 9: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 10: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 11: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
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NEW QUESTION # 51
What is a SELF JOIN in SQL?
Answer: A
NEW QUESTION # 52
What will the following SQL query do?
UPDATE employees
SET salary = salary * 1.1
WHERE department_id = 10;
Answer: A
NEW QUESTION # 53
Which of the following SQL commands retrieves data from a relational database?
Answer: D
NEW QUESTION # 54
What is the result of the following query?
SELECT employee_id
FROM employees
WHERE EXISTS (SELECT 1 FROM departments WHERE department_id = 10);
Answer: A
NEW QUESTION # 55
What is a subquery in SQL?
Answer: C
NEW QUESTION # 56
......
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