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| Section | Weight | Objectives |
|---|---|---|
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Operator precedence rules - Sorting query results - Arithmetic expressions and NULL values |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Using Functions | 25% | - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit - Nested functions - Restricting group results - ROUND, TRUNC, MOD functions - Group functions and grouping data |
| DDL for Tables and Relationships | 15% | - Constraints management - CREATE TABLE statement - TRUNCATE TABLE statement - Temporary and external tables - Drop columns, set unused columns - Views management - Table structure, columns, data types |
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NEW QUESTION # 109
What is the purpose of using external tables in Oracle Database?
Answer: C
NEW QUESTION # 110
Which statement can be used to undo changes made in a transaction?
Answer: C
NEW QUESTION # 111
What is the result of using the following SQL query?
SELECT 100 + NULL AS result;
Answer: D
NEW QUESTION # 112
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;
Answer: C
NEW QUESTION # 113
What does the INTERSECT operator do in SQL?
Answer: B
NEW QUESTION # 114
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