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