text: **Reading data**
  
  DynamoDB is a non-relational NoSQL database that does not support table joins. Instead, 
  
  applications read data from one table at a time. There are four ways to read data: 
  
  • GetItem – Retrieves a single item from a table. This is the most eﬃcient way to read a single 
  item because it provides direct access to the physical location of the item. (DynamoDB also 
  
  provides the BatchGetItem operation, allowing you to perform up to 100 GetItem calls in a 
  single operation.) 