DynamoDB - with AWS SDK
You want to retrieve multiple items by their keys in one request using AWS SDK for JavaScript/Node.js. Which method should you use?
You want to retrieve multiple items by their keys in one request using AWS SDK for JavaScript/Node.js. Which method should you use?
hard🚀 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify method for multiple key retrieval
BatchGetItemCommand allows fetching multiple items by keys in a single request.Step 2: Differentiate from other commands
GetItemCommand fetches one item; QueryCommand filters by partition key; ScanCommand reads entire table.Final Answer:
BatchGetItemCommand -> Option AQuick Check:
Multiple keys retrieval = BatchGetItemCommand [OK]
Quick Trick: Use BatchGetItemCommand for multiple keys in one call [OK]
Common Mistakes:
MISTAKES- Using GetItemCommand for multiple keys
- Confusing QueryCommand with batch retrieval
- Using ScanCommand unnecessarily
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