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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Functions | 25% | - Restricting group results - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Date arithmetic and date functions - Nested functions |
| Topic 2: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Topic 3: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 4: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Topic 5: Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Topic 6: DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - TRUNCATE TABLE statement - Table structure, columns, data types - Constraints management - CREATE TABLE statement - Temporary and external tables - Views management |
| Topic 7: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Topic 8: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 9: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 10: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Topic 11: Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Operator precedence rules - Sorting query results - Arithmetic expressions and NULL values |
1. Which function is used to extract the year from a date in SQL?
A) GET_YEAR(date)
B) EXTRACT(YEAR FROM date)
C) YEAR(date)
D) TO_YEAR(date)
2. What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;
A) Retrieves all employees, sorted by department ID
B) Retrieves employees with salary less than 5000, sorted by department ID
C) Retrieves all employees with a salary greater than 5000, sorted by department ID in ascending order
D) Retrieves all employees with a salary greater than 5000, sorted by salary in ascending order
3. Which type of join retrieves only the rows with matching values in both tables?
A) INNER JOIN
B) CROSS JOIN
C) NATURAL JOIN
D) OUTER JOIN
4. Which Oracle SQL function returns the current date and time, including time zone information?
A) CURRENT_DATE
B) NOW
C) SYSDATE
D) CURRENT_TIMESTAMP
5. What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;
A) Concatenated first and last names with spaces in between
B) Only the first names of employees
C) Concatenated first and last names without spaces
D) A syntax error
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: C | Question # 3 Answer: A | Question # 4 Answer: D | Question # 5 Answer: A |
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