SQL injection is a type of attack in which an attacker inserts malicious code into a SQL query. This code can then be used to extract data from the database, modify data in the database, or even execute arbitrary commands on the server.

There are a number of ways to prevent SQL injection, including:

• Using prepared statements: Prepared statements are a way of preventing SQL injection by templating the SQL query and then binding the values to the template at runtime. This prevents the attacker from injecting malicious code into the query.
• Using parameterized queries: Parameterised queries are similar to prepared statements, but they use a different syntax. They are also known as parametrized SQL queries.
• Escaping input data: Input data should be escaped before it is used in a SQL query. This means that special characters, such as single quotes, should be converted into their escaped form. This prevents the attacker from using these characters to inject malicious code into the query.
• Using a web application firewall (WAF): A WAF is a software application that can be used to filter out malicious traffic, including SQL injection attacks.
• Keeping the database software up to date: Database software vendors often release security patches to fix vulnerabilities that could be exploited by attackers. It is important to keep the database software up to date to protect against these vulnerabilities.

By following these best practices, you can help to prevent SQL injection attacks.

Here are some additional things to keep in mind when preventing SQL injection:

• Be careful about the data that you accept from users. Do not accept data that you do not trust.
• Use a secure coding practices. This includes using prepared statements and escaping input data.
• Train your developers on how to prevent SQL injection.
• Implement security measures, such as a WAF.
• Keep your database software up to date.

By following these best practices, you can help to protect your website or application from SQL injection attacks.