Amazon DynamoDB Global secondary index Icon

Amazon DynamoDB Global Secondary Indexes (GSIs) provide alternative ways to access your data in DynamoDB tables. Unlike a primary key, which is fixed, a GSI lets you query your data using a different attribute as the key, offering flexibility in how you access your items. This is especially useful when you need to run frequently used queries that aren't based on the table's primary key, improving the performance of your application by reducing the need to scan the entire table.