title: Get sum of database sizes?
body: <p>I am running the following query :-</p>
  <pre><code>SELECT table_schema AS &quot;Database&quot;, 
  ROUND(SUM(data_length + index_length) / 1024 / 1024, 2) AS &quot;Size (GB)&quot; 
  FROM information_schema.TABLES 
  GROUP BY table_schema;
  </code></pre>
  <p>Which returns the database and it's sizes in the following way :-</p>
  <pre><code>Database      Size(Gb)
  db_1          1.96
  db_2          0.88
  db_3          3.99
  .             .
  .             .
  .             .
  .             .
  </code></pre>
  <p>How do i get the total sum of the sizes of the databases?</p>