title: UnicodeDecodeError with pandas.read_sql
body: <pre class="lang-none prettyprint-override"><code>UnicodeDecodeError: 'charmap' codec can't decode byte 0x90 in position 8: character maps to &lt;undefined&gt;
  </code></pre>
  <p>Am seeing the above error in this simple SQL query:</p>
  <pre><code>df = pd.read_sql(query,connection)
  </code></pre>
  <p>I tried the query normally on SQL developer and it works perfectly fine. I am really stumped here as to how to specify encoding in a read_sql call.</p>
  <p>Am using Python 3.4 and pandas version 0.14.1</p>