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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Functions | 25% | - Character functions for string manipulation - Data type conversion: implicit and explicit - Date arithmetic and date functions - Restricting group results - Group functions and grouping data - Nested functions - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions |
| Topic 2: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Topic 3: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 4: DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - Table structure, columns, data types - Views management - Constraints management - Temporary and external tables - CREATE TABLE statement - TRUNCATE TABLE statement |
| Topic 5: Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 6: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 7: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 8: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Sorting query results - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Operator precedence rules - Using SELECT statement and column aliases |
| Topic 9: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Topic 10: Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Topic 11: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
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NEW QUESTION # 77
What will the following SQL query do?
UPDATE employees
SET salary = salary * 1.1
WHERE department_id = 10;
Answer: B
NEW QUESTION # 78
What happens when the TRUNCATE TABLE statement is executed?
Answer: A
NEW QUESTION # 79
What does the UNION ALL operation do when selecting matching columns from different tables?
SELECT employee_id, salary FROM employees
UNION ALL
SELECT employee_id, bonus FROM bonuses;
Answer: C
NEW QUESTION # 80
What is the primary purpose of an index in SQL?
Answer: A
NEW QUESTION # 81
Which command revokes a user's privilege to update a table?
Answer: B
NEW QUESTION # 82
......
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