title: Difference between Relational Algebra and Relational calculus
body: <p>What is the exact difference between relational algebra and relational calculus. At most of the reference, it will be </p>
  
  <p><code>Relational algebra is procedural and calculus is non procedural</code>. </p>
  
  <p>So, what is these stands for. However, we can solve all the problems using relational
  algebra. Then why we would use relational calculus. Except definition, Explanation with example is much appreciated.  </p>