title: How to keep leading/prefix zeros when export to Excel/csv by SQL query statement?
body: <p>I use Oracle and I would like to know how to keep leading/prefix zeros when export to Excel/csv by below SQL query statement?</p>
  
  <p>Supposed <code>B.h</code>（string type） maybe have the values of 00068573 and 098235</p>
  
  <pre><code>SELECT A.e,
         A.f,
         A.g,
         B.h
  FROM A 
  JOIN C ON C.e=A.e
  JOIN B ON C.j=B.j; 
  </code></pre>
  
  <p>and I export data in Python, partial code as below:</p>
  
  <pre><code>for row_data in cursor:
      output.writerow(row_data)
  </code></pre>
  
  <p>Thank you so much for any advice.</p>