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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Table structure, columns, data types - TRUNCATE TABLE statement - Constraints management - Drop columns, set unused columns - Temporary and external tables - Views management |
| Topic 2: Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 3: Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Sorting query results - Operator precedence rules |
| Topic 4: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Topic 5: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 6: Using Functions | 25% | - Restricting group results - ROUND, TRUNC, MOD functions - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Date arithmetic and date functions - Data type conversion: implicit and explicit - Nested functions - Group functions and grouping data |
| Topic 7: Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Topic 8: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 9: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 10: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Topic 11: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
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NEW QUESTION # 45
Which function is used to extract the year from a date in SQL?
Answer: B
NEW QUESTION # 46
What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;
Answer: C
NEW QUESTION # 47
What is the purpose of the SAVEPOINT statement?
Answer: B
NEW QUESTION # 48
Which type of INSERT statement allows inserting rows into multiple tables using a single SELECT query?
Answer: D
NEW QUESTION # 49
Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?
Answer: B
NEW QUESTION # 50
......
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