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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Topic 2: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 3: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 4: Using Functions | 25% | - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Character functions for string manipulation - Date arithmetic and date functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions - Nested functions |
| Topic 5: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Topic 6: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Topic 7: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 8: DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Constraints management - Views management - Table structure, columns, data types - Drop columns, set unused columns - CREATE TABLE statement - Temporary and external tables |
| Topic 9: Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Limiting rows and substitution variables - Sorting query results - Using SELECT statement and column aliases - Operator precedence rules - Operators, literals, DISTINCT keyword |
| Topic 10: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 11: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
1. What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;
A) The time part of the current date
B) The current date in the default system format
C) An error
D) The current date in the format 'DD-MM-YYYY'
2. What type of join does the following query perform?
SELECT *
FROM employees e, departments d
WHERE e.department_id = d.department_id;
A) NATURAL JOIN
B) CROSS JOIN
C) EQUI JOIN
D) OUTER JOIN
3. Which of the following can be achieved using a correlated subquery?
A) Retrieving duplicate records from a single table
B) Inserting data into a table
C) Joining two tables without a common column
D) Comparing each employee's salary to the average salary of their department
4. Which command creates a new role in Oracle Database?
A) CREATE NEW ROLE role_name;
B) CREATE ROLE role_name;
C) ADD ROLE role_name;
5. In a relational database, what is a foreign key?
A) A key that is used to establish a relationship between two tables
B) A unique identifier for a record in a table
C) A temporary key generated during query execution
D) A key used to sort data in a specific order
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: C | Question # 3 Answer: D | Question # 4 Answer: B | Question # 5 Answer: A |
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