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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 2: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Topic 3: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 4: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Drop columns, set unused columns - TRUNCATE TABLE statement - Table structure, columns, data types - Views management - Temporary and external tables - Constraints management |
| Topic 5: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 6: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 7: Using Functions | 25% | - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Nested functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Group functions and grouping data |
| Topic 8: Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Sorting query results - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Limiting rows and substitution variables - Operator precedence rules - Arithmetic expressions and NULL values |
| Topic 9: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 10: Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Topic 11: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
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NEW QUESTION # 74
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
Answer: D
NEW QUESTION # 75
What is the purpose of the DBA_OBJECTS data dictionary view?
Answer: D
NEW QUESTION # 76
In a relational database, what is a foreign key?
Answer: D
NEW QUESTION # 77
What does the following command do?
GRANT CREATE SESSION TO user_name;
Answer: A
NEW QUESTION # 78
What is a subquery in SQL?
Answer: B
NEW QUESTION # 79
......
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