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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Topic 2: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Topic 3: Using Functions | 25% | - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions - Nested functions - Group functions and grouping data - Date arithmetic and date functions - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Data type conversion: implicit and explicit |
| Topic 4: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Topic 5: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 6: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Topic 7: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 8: 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 9: DDL for Tables and Relationships | 15% | - Views management - Drop columns, set unused columns - Constraints management - Table structure, columns, data types - CREATE TABLE statement - TRUNCATE TABLE statement - Temporary and external tables |
| Topic 10: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Topic 11: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
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NEW QUESTION # 41
Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?
Answer: C
NEW QUESTION # 42
What is the purpose of the MERGE statement in SQL?
Answer: B
NEW QUESTION # 43
Which of the following best describes a relational database?
Answer: C
NEW QUESTION # 44
What is the relationship between SQL and a relational database?
Answer: C
NEW QUESTION # 45
How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?
Answer: C
NEW QUESTION # 46
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