: This command tells the database to combine the results of the original (legitimate) search with a second search created by the attacker.
: This is a comment marker in SQL. It tells the database to ignore everything that comes after it, effectively "breaking" the rest of the original, legitimate code so it doesn't cause an error. A Helpful Story: The Librarian and the Hidden Note : This command tells the database to combine
The librarian goes to the back (the database), finds the gardening books, and brings them to you. A Helpful Story: The Librarian and the Hidden
To understand how this works in "real life," imagine you are at a library: It ensures the database treats all user input
You go to the librarian (the website) and ask, "Show me all books about Gardening " (the KEYWORD ).
This is the "gold standard" for security. It ensures the database treats all user input as simple text, never as executable code.
If the librarian is "vulnerable," they won't realize you've added a second, unauthorized command. They will return with a stack of gardening books, but sitting right on top will be a slip of paper with a name from the payroll. How to Stay Safe