[mothered]

I realize this thread Is over 2 weeks old, but I've completely missed It.

First and foremost, do you have knowledge of the SQL language?

Kind of sort of. I know about the methods it utilizes.

I suggest to at least learn the basics of SQL- how to select, query and manipulate databases. This will significantly help to understand how and why SQLi attacks (In-Band, Union-Based, Boolean-Based, Inferential/Blind) work.

As a starting point, no need to go through each function, clause, constraint, operator and so forth. As you advance, SQL proficiency Is paramount.