title: SQL how many records start with the same letter
body: <p>So I have thousands of records in a database in a column A.</p>
  
  <p>I want to see how many start with each letter of the alphabet and all single digit numbers.</p>
  
  <p>So i need a count and the letter associated to it. I also want to see all the two alphanumeric combinations i.e. aa ab ac ad ae etc. and their count.</p>
  
  <p>Also with three and four characters etc.</p>