title: How to mask a specified field in a table when I query it using big query?
body: <p>I want to mask a specified field in a table when I query it using big query. For example: a table named employee has <code>email-id</code> column, so when I query the table all the <code>email-id</code> field should be masked with ****.</p>
  
  <p>How can I do it using DLP in google?</p>