title: What MySQL Datatype to use for two capital letters
body: <p>I'd like to store the area part of a UK postcode (zip code) in db column. The potential size of the db will run into millions of records so I'm keen for the column to take up as little space as possible.</p>
  
  <p>What I want to store will be one two capital letters - "CO" , "SE" or "B"  ect</p>
  
  <p>What's the best datatype to use for this column? TEXT?</p>
  
  <p>Many thanks</p>