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DynamoDB transactions let you atomically write or read up to 25 items across tables. This blog explains the guarantees, limits, cost, and provides a concrete CLI example to help you decide when to use them.
Learn how to handle DynamoDB's 1 MB result limit using LastEvaluatedKey and ExclusiveStartKey, and why empty item lists don't always mean the end of your data.
Learn how to use ConditionExpression in DynamoDB UpdateItem to prevent race conditions and ensure attributes are updated only when they match an expected value or are absent.
dynamodb