title: How to populate sequence numbers in BigQuery
body: <p>Is there any way to populate sequence numbers along with the records in BigQuery?
  Say for example if I'm inserting 1000 records in BigQuery table, then there must a field (seq. no.) which will contain the record number for each insertion. Next time when another insertion happens then sequence number should start from 1001.
  Please let me know if there is any such built-in facility or any workaround in Bigquery.</p>