title: One to One Relationship / Unique Key Pairs
body: <p>I have a database with two tables, games and regions. My goal is to keep track of the release dates in each region for the games.</p>
  
  <p>Granted, regions wont change very often, but would it be better to create a new column for each region in games, or create a release_dates table between them?</p>
  
  <p>If I create a new table between them, how would I ensure that there is only one release date for each region/game pair?</p>