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| Section | Weight | Objectives |
|---|---|---|
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - CREATE TABLE statement - Constraints management - Temporary and external tables - TRUNCATE TABLE statement - Table structure, columns, data types - Views management |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Limiting rows and substitution variables - Sorting query results - DEFINE and VERIFY commands - Operator precedence rules - Using SELECT statement and column aliases |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Using Functions | 25% | - Group functions and grouping data - Date arithmetic and date functions - Nested functions - Restricting group results - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
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NEW QUESTION # 79
What will the following SQL query do?
UPDATE employees
SET salary = salary * 1.1
WHERE department_id = 10;
Answer: D
NEW QUESTION # 80
Which of the following data dictionary views provides information about constraints on tables?
Answer: B
NEW QUESTION # 81
What does the following query return?
SELECT employee_id
FROM employees
WHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);
Answer: B
NEW QUESTION # 82
Which INTERVAL data type would you use to store a period of time in years and months?
Answer: B
NEW QUESTION # 83
Which of the following best describes a relational database?
Answer: D
NEW QUESTION # 84
......
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