Wanting a place to start

I just recently started a new position at my work that has extensive involvement with Command Prompt searches and designing Microsoft SQL queries to search within a network database.

I was pointed towards this site as a place to help myself become proficient in using those. I was hoping for a nudge towards a good place to start with absolutely no knowledge of coding of any sort. Is it necessary to start with the standard HTML courses for a base of knowledge or can I start with courses more specific to what I need to learn first?