: Someone checking if a site is secure.
: This is used to close a parenthesis that might exist in the original, legitimate query's code. -2563) ORDER BY 1#
: This command tells the database to sort the results by the first column. In an attack, this is often used to "fingerprint" the database—if the page loads normally, the attacker knows there is at least one column. They will then try ORDER BY 2 , 3 , etc., until the page breaks, revealing exactly how many columns are in the table. : Someone checking if a site is secure