title: Joins are for lazy people?
body: <p>I recently had a discussion with another developer who claimed to me that JOINs (SQL) are useless. This is technically true but he added that using joins is less efficient than making several requests and link tables in the code (C# or Java). </p>
  
  <p>For him joins are for lazy people that don't care about performance. Is this true? Should we avoid using joins?</p>