In DynamoDB, what is the purpose of the sort key?

easy📝 Conceptual Q2 of 15

AWS - DynamoDB

In DynamoDB, what is the purpose of the sort key?

ATo uniquely identify an item across all partitions

BTo encrypt data at rest

CTo sort items with the same partition key

DTo define the table's read capacity

Step-by-Step Solution

Solution:

Step 1: Identify sort key function
The sort key organizes items that share the same partition key by sorting them.
Step 2: Exclude unrelated options
Encryption and capacity are unrelated; uniqueness across partitions is by partition key plus sort key.
Final Answer:
To sort items with the same partition key -> Option C
Quick Check:
Sort key = Sorts items within partition [OK]

Quick Trick: Sort key orders items sharing partition key [OK]

Common Mistakes:

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