title: Get Table_Id along with Rowcount for all Tables in a Project
body: <p>There are >100 datasets in one of my project and I want to get the Table_id * No_of_rows of each table lying in these 50 datasets. </p>
  
  <p>I can get the metadata of a Dataset using the following query.</p>
  
  <pre><code>SELECT
    Project_id,
    dataset_id,
    table_id,
    row_count
  FROM
    Project.dataset.__TABLES__
  </code></pre>
  
  <p>I can do this for each and every dataset (But that would take 100 iterations). Is there a better way?? </p>