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)
- Are DynamoDB table names globally unique?
- How to create an index in DynamoDB? (how to create an index in dynamodb)
- Can DynamoDB have nested objects?
- How to import data from S3 to DynamoDB?
- Is connection pooling needed for DynamoDB?
- Are DynamoDB table names supposed to be unique?
- How to count rows in DynamoDB?
- Can DynamoDB have null values?
- Can Django use DynamoDB?
- Is DynamoDB HIPAA compliant?
- Can DynamoDB have duplicates?
- Is DynamoDB table region specific?
- How to store Japanese characters in DynamoDB?
- What is the maximum number of partitions in DynamoDB?
- Is DynamoDB based on MongoDB?