title: What is Hash and Range Primary Key?
body: <p>I am not able to understand what Range / primary key is here in the docs on <a href="https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/WorkingWithTables.html" rel="noreferrer">Working with Tables and Data in DynamoDB</a></p>
  <p>How does it work?</p>
  <p>What do they mean by &quot;unordered hash index on the hash attribute and a sorted range index on the range attribute&quot;?</p>