Working with DynamoDB
Explore how to effectively use DynamoDB by learning the differences between scanning and querying items. Understand how to apply filters to retrieve specific data and perform table operations using the AWS CLI. This lesson helps you manage DynamoDB tables and optimize data access for workflow automation.
We'll cover the following...
Scan or query items in DynamoDB
Let's use the library analogy to explain the difference between scanning and querying items in DynamoDB.
In a library, we have numerous books, and we need to find a specific one. We can either browse through every book one by one (scan) or ask the librarian for help, who uses the library's organized system to quickly locate the book we're looking for (query).
Scan
Scanning is like browsing through every book in the library, one by one, until we find the one we need. In DynamoDB, a scan operation reads every item in the table and returns the items that meet our filtering criteria, if any. Scans can be slow and inefficient, especially for large tables, as they ...