Error in Google BigQuery <EOF>
<p>I am new to Google BigQuery. I need help with the query error:</p>

<blockquote>
  <p>"Encountered " "WITH" "with "" at line 1, column 1. Was expecting:
  EOF"</p>
</blockquote>

<pre><code>with
  t1 as 
  (
    select
    date(USEC_TO_TIMESTAMP(event_dim.timestamp_micros)) date, event_dim.name
    from
    [myfoody-1313:it_rawfish_myfoody_ANDROID.app_events_20160727]
    where
    event_dim.name='pv_detail' and event_dim.params.key='item_id' and
    event_dim.params.value.string_value='31'
  )
  select
  date(d) as day, count(event_dim.name)
from
  generate_series(current_date - interval '6 day', current_date, '1 day') d
  left join t1 on t1.date = d
group by day
order by day;
</code></pre>