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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: DDL for Tables and Relationships | 15% | - Views management - TRUNCATE TABLE statement - Constraints management - Drop columns, set unused columns - Temporary and external tables - Table structure, columns, data types - CREATE TABLE statement |
| Topic 2: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 3: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Topic 4: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 5: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 6: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 7: Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Topic 8: Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Limiting rows and substitution variables - Operator precedence rules - Sorting query results - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword |
| Topic 9: Using Functions | 25% | - Nested functions - Restricting group results - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Date arithmetic and date functions - Character functions for string manipulation - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
| Topic 10: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Topic 11: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
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NEW QUESTION # 49
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
Answer: D
NEW QUESTION # 50
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: B
NEW QUESTION # 51
Which of the following statements is true about constraints in Oracle Database?
Answer: D
NEW QUESTION # 52
Which operator can be used in a multiple-row subquery to match a single value to a list of values?
Answer: D
NEW QUESTION # 53
What happens if a privilege is revoked from a user who has granted the same privilege to others?
Answer: D
NEW QUESTION # 54
......
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