• What if you need to query multiple items?
• Dynamo is able to search for records other than the Primary Key...
• ...but the search might be very slow
• A "Scan" looks at all records in the table and pulls the ones you want
• A "Query" uses an index and then potentially filters
• To do a Query, you need to have an index set up
• You need to know how you're going to query your data
• You pay for indices. Need to allocate resources

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