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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Topic 2: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Topic 3: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - Constraints management - Drop columns, set unused columns - TRUNCATE TABLE statement - Temporary and external tables - Views management - CREATE TABLE statement |
| Topic 4: Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Topic 5: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Topic 6: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 7: Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Operator precedence rules - Limiting rows and substitution variables |
| Topic 8: Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Group functions and grouping data - Character functions for string manipulation - Data type conversion: implicit and explicit - Restricting group results - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - Nested functions |
| Topic 9: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 10: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 11: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
1. What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;
A) Employees and their managers' IDs
B) Employees who do not have managers
C) All employees and their IDs
D) Employees who have managers
2. What is the result of the following query?
SELECT employee_id
FROM employees
WHERE EXISTS (SELECT 1 FROM departments WHERE department_id = 10);
A) Employee IDs from department 10
B) Employees with salaries greater than 10
C) All employee IDs
D) Employee IDs from departments with no employees
3. Which SQL statement is used to create a table?
A) ADD TABLE
B) ALTER TABLE
C) CREATE TABLE
D) INSERT
4. What does the INTERSECT operator do in SQL?
A) Combines all rows from two queries without any conditions
B) Returns rows from the first query that are not present in the second query
C) Combines rows from two queries and includes all duplicates
D) Returns rows that are present in both queries
5. Which command is used to add a new column to an existing table?
A) ADD COLUMN
B) MODIFY COLUMN
C) ALTER TABLE
D) ALTER COLUMN
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: C | Question # 3 Answer: C | Question # 4 Answer: D | Question # 5 Answer: C |
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