{keyword}');select Sleep(5)# -

This is the primary defense. It ensures that user input is treated as data, not as executable code [4].

If you enter this payload into a form and the website takes roughly 5 seconds longer than usual to load, it confirms that the application is vulnerable to SQL injection [2]. {KEYWORD}');SELECT SLEEP(5)#

Here is a detailed breakdown of what this payload does and why it is used. Breakdown of the Payload This is the primary defense

If the payload works, an attacker can replace SLEEP(5) with more complex queries (e.g., IF(SUBSTRING((SELECT password FROM users),1,1)='a', SLEEP(5), 0) ) to extract data character-by-character based on whether the server pauses [3]. Security Implications Here is a detailed breakdown of what this

: This attempts to prematurely close the original, legitimate SQL query statement intended by the developers [2].

This confirms a high-severity vulnerability that could allow attackers to bypass authentication, read sensitive data, or modify database contents.

: This is the malicious command. It instructs the database to pause or "sleep" for 5 seconds before responding to the query [2, 3].