{keyword}' Union All Select Null,null,null,null,null,null,null,null From Msysaccessobjects-- Udhz Link

A system table in Access that contains information about database objects. If successful, the attacker can see if they have access to system metadata [1, 4].

This is the gold standard. It treats user input as literal text, not executable code [6]. A system table in Access that contains information

The best way to stop these attacks is to never "glue" user input directly into your database queries. Instead, use: A system table in Access that contains information

Sources:[1] microsoft.com[2] portswigger.net[3] geeksforgeeks.org[4] sqlinjection.net[5] owasp.org[6] owasp.org A system table in Access that contains information

Matches the number of columns in the original table. Attackers use NULL to figure out how many columns they need to match without causing a data type error [2, 3].