title: MySQL Indexes: Having multiple indexes vs. having one multi-field key?
body: <p>When I manually create tables in MySQL, I add indexes one at a time for each field that I think I will use for queries.</p>
  
  <p>When I use phpMyAdmin to create tables for me, and I select my indexes in the create-table form, I see that phpMyAdmin combines my indexes into 1 (plus my primary).</p>
  
  <p>What's the difference? Is one better than the other? In which case?</p>
  
  <p>Thanks!</p>