title: SQL Select First Two Characters Of Postcodes
body: <p>I need to select the first two characters of a post code which I can do.
  E.G "BW" "CW" Etc.</p>
  
  <p>But when I need to select some post codes that have a number after the first letter e.g "B1,B2,B3,B4"   how would I do this?</p>
  
  <p>I think I need a wildcard for numeric values only so it will only show the "B1,B2" and not "BW,BT" etc.</p>
  
  <p>Thank you.</p>