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

Are you working on or just curious about how these injection patterns work?

Appends a new set of results to the original query [2, 5]. Are you working on or just curious about

Breaks out of the intended data field in a SQL query. Are you working on or just curious about

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]. Are you working on or just curious about

The best way to stop these attacks is to never "glue" user input directly into your database queries. Instead, use: