DynamoDB increment a key/value

Question

if I was to have a DynamoDB table with a UserID as a key and a number as a value can I increment that number/value in a single operation? or do I need to read it out, increment and write it back in?

thx

Answer 1

DynamoDB supports the concept of atomic counters. You would simply call update_item with action: "ADD" to automatically increment the value for an item.