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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving and Sorting Data | 15% | - Operator precedence rules - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Limiting rows and substitution variables - Sorting query results |
| Topic 2: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 3: Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Nested functions - Restricting group results - Group functions and grouping data - Character functions for string manipulation - Date arithmetic and date functions - ROUND, TRUNC, MOD functions |
| Topic 4: Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 5: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Topic 6: DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - Views management - TRUNCATE TABLE statement - CREATE TABLE statement - Constraints management - Temporary and external tables - Table structure, columns, data types |
| Topic 7: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 8: Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Topic 9: Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 10: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 11: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
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NEW QUESTION # 11
What will the following SQL query return?
SELECT TRUNC(15.678, 2) AS truncated_value FROM dual;
Answer: B
NEW QUESTION # 12
What does the following SQL query return?
SELECT employee_id, salary * 12 AS annual_salary FROM employees;
Answer: B
NEW QUESTION # 13
Which command can be used to rename a table in Oracle Database?
Answer: A
NEW QUESTION # 14
Which SQL keyword is used to remove duplicate rows from the result set of a query?
Answer: B
NEW QUESTION # 15
What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;
Answer: A
NEW QUESTION # 16
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