title: Get COUNT() of rows where first 3 digits of column are alike
body: <p>I have a result set of codes that are usually three digits followed by up to 2 digits like <code>012.34</code> or <code>123.45</code>. The first three digits define a general category of group, and the digits following the decimal place define more specific qualities. There could be 77 <code>012.xx</code> numbers, and there are hundreds of unique 3 digit group definitions, followed by a varying number of digits per entry.</p>
  
  <p>Does anyone know how to write a quick query to achieve this?</p>