title: SQL SUMMING A COLUMN
body: <p>I have a table in oracle 
  Table: Mark</p>
  
  <pre><code> id  |   subject |    points 
  ---- | ------    |   ------ 
  2    |  math    |   35
  2   |   english  |  40
  2     | science   | 30
  3    |   math    |  30
  3    |  english  |   20
  3    |  science |   10
  </code></pre>
  
  <p>What will will the Query if i need <code>35+40+30 =105</code>
  Is it </p>
  
  <pre><code>Select sum(points) from Mark where ID = '2';   ???
  </code></pre>
  
  <p>Any suggestions will be appreciated </p>