text: Items in DynamoDB are similar to rows, records, or tuples in other database systems. In DynamoDB, 
  
  there is no limit to the number of items you can store in a table. DynamoDB items have a size limit 
  
  of 400KB. An*item collection*, a group of related items that share the same partition key value, are 
  
  used to model one-to-many relationships. (1) 