title: Count the number of occurences of a character in a string - BigQuery
body: <p>We would like to run a query that returns no of character in the given string if i have a string say : Baitul Sharaf, 105 Hill Road, Bandra (west), Mumbai
  I want to count no of ',' in the above string (In above case 3)</p>
  
  <p>see the reference for my question <a href="https://stackoverflow.com/questions/881085/count-the-number-of-occurances-of-a-character-in-a-string-in-javascript">Count the number of occurrences of a character in a string in Javascript</a>
  I want to achieve the same in BigQuery</p>