title: Database Query to get sum of count from different tables in a single query
body: <p>I am writing a query in Mysql database, in which 
  Query 1 returns count(<em>) say result is 10
  and 
  Query 2 returns Count(</em>) say result is 30</p>
  
  <p>But I want to get the result as 40, which is sum of both</p>
  
  <p>what are my options to get a single query giving me the result.</p>