title: google-cloud-dataflow : How to read data from a Database and write to BigQuery
body: <p>I need to setup a data pipeline from some source databases like Oracle, MySQL and load the data to BigQuery.</p>
  
  <p>How can I use google-cloud-dataflow to read data from a database(jdbc connection) and write to BigQuery tables using Python.</p>
  
  <p>Also, I have some hive tables in an on-premise Hadoop cluster, how do I transfer this data to BigQuery.</p>
  
  <p>I couldn't find the right documentation or examples to achieve this.
  Can you please point me in the right direction.</p>