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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: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 3: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 4: Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Sorting query results - Operator precedence rules - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Limiting rows and substitution variables |
| Topic 5: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Topic 6: Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 7: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Topic 8: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Topic 9: Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Date arithmetic and date functions - Data type conversion: implicit and explicit - Character functions for string manipulation - Group functions and grouping data - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions - Restricting group results - Nested functions |
| Topic 10: DDL for Tables and Relationships | 15% | - Temporary and external tables - CREATE TABLE statement - Drop columns, set unused columns - Views management - Table structure, columns, data types - TRUNCATE TABLE statement - Constraints management |
| Topic 11: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
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NEW QUESTION # 52
Which Oracle SQL function returns the current date and time, including time zone information?
Answer: B
NEW QUESTION # 53
What happens when the TRUNCATE TABLE statement is executed?
Answer: A
NEW QUESTION # 54
Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?
Answer: D
NEW QUESTION # 55
Which of the following is a valid reason to create a synonym?
Answer: A
NEW QUESTION # 56
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
Answer: A
NEW QUESTION # 57
......
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