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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 2: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 3: DDL for Tables and Relationships | 15% | - Constraints management - TRUNCATE TABLE statement - Temporary and external tables - Drop columns, set unused columns - CREATE TABLE statement - Views management - Table structure, columns, data types |
| Topic 4: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Topic 5: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 6: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 7: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 8: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 9: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Topic 10: Using Functions | 25% | - Nested functions - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit - Character functions for string manipulation |
| Topic 11: Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Limiting rows and substitution variables - Operator precedence rules - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Sorting query results |
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NEW QUESTION # 11
Which component of an ERD (Entity-Relationship Diagram) represents the attributes of an entity?
Answer: A
NEW QUESTION # 12
Which of the following best describes a relational database?
Answer: A
NEW QUESTION # 13
What does the INTERSECT operator do in SQL?
Answer: D
NEW QUESTION # 14
Which operator can be used in a multiple-row subquery to match a single value to a list of values?
Answer: B
NEW QUESTION # 15
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
Answer: B
NEW QUESTION # 16
......
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