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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Functions | 25% | - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - Restricting group results - Nested functions - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Character functions for string manipulation |
| Topic 2: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Topic 3: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 4: Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Topic 5: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 6: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Drop columns, set unused columns - Constraints management - Table structure, columns, data types - Temporary and external tables - Views management - TRUNCATE TABLE statement |
| Topic 7: Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 8: Retrieving and Sorting Data | 15% | - Operator precedence rules - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Sorting query results |
| Topic 9: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 10: Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 11: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
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NEW QUESTION # 22
What is the result of using the following SQL query?
SELECT 100 + NULL AS result;
Answer: A
NEW QUESTION # 23
What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;
Answer: A
NEW QUESTION # 24
What is the primary purpose of an index in SQL?
Answer: C
NEW QUESTION # 25
What does the following command do?
GRANT CREATE SESSION TO user_name;
Answer: A
NEW QUESTION # 26
Which command grants a user the ability to query data from a specific table?
Answer: B
NEW QUESTION # 27
......
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