Step 1: Install Sublime Text 3 - https://www.sublimetext.com/3
- it's technically $70 but it's also free to try forever - you'll just get a popup every couple saves asking you to buy it
Step 2: Install Bracket Highlighter - https://facelessuser.github.io/BracketHighlighter/installation/
- Follow the "Package Control" instructions step-by-step
Step 2: Open a file with SQL in Sublime Text
Step 3: If the syntax isn't already highlighted, go to View > Syntax > SQL