title: why hash partitioning in oracle introduced? what is the advantage
body: <p>I undergone various websites about hash partitioning in oracle but I am unable to understand the advantage of it.
  I came to know that even sometimes by using range partition the data can be distributed uneven.
  So we are going for Hash Partitioning.</p>
  
  <p>So anyone please explain me what is hash partitioning,necessity of hash partitioning?</p>
  
  <p>why we are going for Hash partitioning?  </p>
  
  <p>why we are using 2 power n tablespaces in creating hash partitioning  </p>
  
  <p>what happens exactly when we do hash partitioning?</p>
  
  <p>Please can anyone explain me in detail?</p>
  
  <p>Thanks in advance.</p>