📚 Topic Summary
SQL Injection is a serious security vulnerability that allows attackers to interfere with the queries that an application makes to its database. They can bypass security measures and potentially read, modify, or delete data. Parameterized queries and prepared statements are powerful techniques to prevent SQL Injection. Instead of directly embedding user inputs into SQL queries, these methods treat user input as data, not as part of the SQL command, thus preventing malicious SQL code from being executed.
This worksheet introduces the concepts of parameterized queries and prepared statements, demonstrating how they can protect your database from SQL injection attacks. Using these techniques ensures that your applications handle user input safely, keeping your data secure.
🔑 Part A: Vocabulary
Match the following terms with their correct definitions:
| Term |
Definition |
| 1. SQL Injection |
A. A technique to prevent SQL injection by treating user input as data. |
| 2. Parameterized Query |
B. A placeholder in an SQL query that is later replaced with a value. |
| 3. Prepared Statement |
C. A type of security vulnerability where attackers insert malicious SQL code into a query. |
| 4. Placeholder |
D. A precompiled SQL statement with placeholders for parameters. |
| 5. Data Sanitization |
E. The process of cleaning and validating user input to prevent malicious data from entering the system. |
✏️ Part B: Fill in the Blanks
Complete the following paragraph using the words provided: data, prepared statement, SQL injection, parameterized queries, placeholders.
To prevent __________, developers can use __________ and __________. These methods use __________ to represent user input, treating it as __________, rather than executable code. A __________ is precompiled, improving efficiency and security.
🤔 Part C: Critical Thinking
Imagine you are developing a web application that allows users to search for products. Explain in detail how you would implement parameterized queries to prevent SQL injection attacks. Provide a code example (using a language like Python with SQLite) to demonstrate your approach.
