Question: What does the DynamoDB query return?

Answered by Rafal Wilinski
Answer
The DynamoDB query operation returns one or more items from a table or a secondary index. The query operation retrieves data from a table or index using the primary or secondary key.
When performing a query operation, you need to specify the table or index name, the primary or secondary index key, and a condition expression. The condition expression is used to filter the items that are returned by the query operation.
The query operation returns the items as an unordered set of items. The returned items are limited to the maximum number of items specified in the query request. If the query results in more items than the specified limit, the operation returns a LastEvaluatedKey value that can be used to retrieve the next set of items.
If you use the optional "ProjectionExpression" attribute, the query will return only the specified attributes and not the whole item.
Other Common DynamoDB FAQ (with Answers)
- Can DynamoDB have duplicates?
- How to handle empty strings in DynamoDB?
- Is DynamoDB a key-value store?
- Are DynamoDB table names supposed to be unique?
- Can DynamoDB store images?
- Is DynamoDB columnar database?
- Can DynamoDB be used like a relational database?
- What is DynamoDB white paper, and what are the key takeaways?
- Does DynamoDB have read replicas?
- Can DynamoDB table have adhoc attributes?
- Can DynamoDB have nested objects?
- Does Amazon DynamoDB store healthcare data?
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- Which AWS regions support DynamoDB?
- Can DynamoDB have multiple tables?