title: SQL update multiple rows with same value
body: <p>I use this to update (add points) rows which <code>mgroup</code> is <code>15</code></p>
  
  <pre><code>UPDATE ibf_members SET points = points + 500 WHERE mgroup = 15
  </code></pre>
  
  <p>What can I use to update (add points + 500) for rows which has its <code>id</code> as <code>5</code>, <code>7</code>, <code>10</code>, <code>11</code>, <code>16</code>, <code>25</code> <em>and also has</em> <code>mgroup</code> as <code>15</code>?</p>