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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Topic 2: Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Operator precedence rules - Sorting query results - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Limiting rows and substitution variables |
| Topic 3: Using Functions | 25% | - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Restricting group results - Group functions and grouping data - Date arithmetic and date functions - Nested functions |
| Topic 4: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Topic 5: DDL for Tables and Relationships | 15% | - Views management - Temporary and external tables - Drop columns, set unused columns - TRUNCATE TABLE statement - Table structure, columns, data types - Constraints management - CREATE TABLE statement |
| Topic 6: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 7: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 8: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Topic 9: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 10: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Topic 11: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
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NEW QUESTION # 84
Which of the following SQL commands retrieves data from a relational database?
Answer: D
NEW QUESTION # 85
Which clause is used to allow a user to grant a privilege to others?
Answer: A
NEW QUESTION # 86
Which of the following data dictionary views provides information about constraints on tables?
Answer: A
NEW QUESTION # 87
Which type of join retrieves only the rows with matching values in both tables?
Answer: B
NEW QUESTION # 88
Which SQL function can be used to replace NULL values with a specified value?
Answer: C
NEW QUESTION # 89
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