title: i would like to divide two colums in Bigquery
body: <p>I would like is possible to divide the column A by the column B as column C, in Bigquery. </p>
  
  <p>For example <code>SELECT prix / surface as prixmcarre FROM 'appartement'</code>, is not possible in bigquery.</p>
  
  <p>Error: <code>No matching signature for operator / for argument types: STRING, STRING. Supported signatures: FLOAT64 / FLOAT64; NUMERIC / NUMERIC at [1:8]</code></p>
  
  <p>In the Google Cloud Document, I don't see the simple solution.</p>
  
  <p>Thank's for your help :)</p>