{keyword});select | Sleep(5)#

A good WAF can detect and block "sleep" patterns before they ever reach your server.

If you are looking to write a blog post about this specific topic, here is a structured outline and draft tailored for a cybersecurity or web development audience.

The site is vulnerable, and they can now begin extracting data bit by bit based on response times. {KEYWORD});SELECT SLEEP(5)#

In many attacks, the database doesn't "talk back" to the user with error messages. This is called Blind SQLi . Hackers use the SLEEP command as a "sonar" pulse: The Request: The attacker sends the payload.

Filter out characters like ; , - , and # that are commonly used in injection attacks. A good WAF can detect and block "sleep"

Don't let your database be put to sleep. The best defense is simple:

: This attempts to "break out" of the developer's intended query. It closes a string and ends the current SQL statement. In many attacks, the database doesn't "talk back"

Never concatenate user input directly into queries. Use parameterized queries so the database treats input as data, not code.