Ravi Sir's Cards › AWS
Query, not scan
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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What this card says
Why do we need it?
Reading the whole table is slow and costly.
What is it?
Query uses the partition key and a sort key range.
--key-condition-expression
How to do it
Scan reads all items, then filters.
ScannedCount
Example
Need a new pattern? Add a GSI and query it.