title: Override table using bq command line
body: <p>I have a Python script (shown below) that runs the query in 'query.txt' and uploads it to google big query. This script has to run every 5 minutes. First time it does correctly, but for the second time, it throws the error "table already exists". I have to override the table if it already exists. I do not find any override option in bq help. Any help would be appreciated.</p>
  
  <pre><code>commandStr = "type C:\Users\sridevibaskaran\query.txt | bq query --destination_table geotab-bigdata-test:TestSridevi.DeviceCarrier_%s -n 1" %(dateToday1)
  os.system(commandStr)
  print commandStr
  </code></pre>