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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 2: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Topic 3: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operator precedence rules - Sorting query results - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - DEFINE and VERIFY commands |
| Topic 4: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Topic 5: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 6: Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Topic 7: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - TRUNCATE TABLE statement - Temporary and external tables - Constraints management - Views management - Drop columns, set unused columns - CREATE TABLE statement |
| Topic 8: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 9: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 10: Using Functions | 25% | - Restricting group results - Character functions for string manipulation - Group functions and grouping data - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Nested functions |
| Topic 11: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
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NEW QUESTION # 62
What does the following SQL query return?
SELECT employee_id, salary * 12 AS annual_salary FROM employees;
Answer: C
NEW QUESTION # 63
Which of the following is true about foreign key constraints in SQL?
Answer: A
NEW QUESTION # 64
Which command revokes a user's privilege to update a table?
Answer: C
NEW QUESTION # 65
Which of the following ensures that a relational database enforces data integrity?
Answer: B
NEW QUESTION # 66
Which SQL function calculates the number of months between two dates?
Response:
Answer: D
NEW QUESTION # 67
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