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DynamoDB, the primary No.SQL database service offered by AWS, is a versatile tool. It's fast, scales without much effort, and best of all, it's on-demand**! These things make DynamoDB the first choice when a datastore is needed for a new project. But as with all technology, it is not all roses. Developers face many of the same issues when starting their No. SQL and normalization know-how doesn't bring you much gain. The most common reasons for this are a typo in the table name or using the wrong account credentials.