title: MySQL SUM when using GROUP BY not working
body: <p>Let's say we have this table:</p>
  
  <pre><code>Symbol | Size
  A      | 12
  B      | 5
  A      | 3
  A      | 6
  B      | 8
  </code></pre>
  
  <p>And we want a view like this:</p>
  
  <pre><code>Symbol | Size
  A      | 21
  B      | 13
  </code></pre>
  
  <p>So we use this:</p>
  
  <pre><code>Select Symbol, sum(Size) from table group by Symbol order by Symbol ASC
  </code></pre>
  
  <p>But instead we get this:</p>
  
  <pre><code>Symbol | Size
  A      | 12
  B      | 5
  </code></pre>
  
  <p>What am I doing wrong?!</p>