In DynamoDB tables, items and attributes are the core component that you work with. A table is a collection of items, and each item is a collection of attributes. DynamoDB uses the primary key to uniquely identify each item in the table and secondary indexes to fire the query more flexibly. DynamoDB also provides streams to capture data modification events in DynamoDB tables. DynamoDB has size limits on the following components—this may vary from region to region:
- Tables, items, and attributes
- Primary key
- Secondary indexes
- DynamoDB streams
In the next section, we will look at these components in detail.
