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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Topic 2: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 3: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Sorting query results - Operator precedence rules - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases |
| Topic 4: Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - 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% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 7: Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Topic 8: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 9: DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - CREATE TABLE statement - Drop columns, set unused columns - Views management - Table structure, columns, data types - Constraints management - Temporary and external tables |
| Topic 10: Using Functions | 25% | - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions - Group functions and grouping data - Restricting group results - Nested functions - Character functions for string manipulation |
| Topic 11: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
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NEW QUESTION # 82
Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?
Answer: B
NEW QUESTION # 83
What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;
Answer: B
NEW QUESTION # 84
Which SQL clause can be used in Oracle to limit the number of rows returned?
Answer: C
NEW QUESTION # 85
What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;
Answer: B
NEW QUESTION # 86
Which data dictionary view provides information about all the columns in tables accessible to the current user?
Answer: D
NEW QUESTION # 87
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