You have a DynamoDB table with a partition key named OrderID. What happens if you insert two items with the same OrderID but different OrderDate values?
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AWS - DynamoDB
You have a DynamoDB table with a partition key named OrderID. What happens if you insert two items with the same OrderID but different OrderDate values?
AThe table automatically creates a composite key using <code>OrderDate</code>.
BBoth items are stored separately because <code>OrderDate</code> is different.
CDynamoDB throws an error due to duplicate partition keys.
DThe second item overwrites the first item because the partition key is the same.
Step-by-Step Solution
Solution:
Step 1: Understand partition key uniqueness
In DynamoDB, the partition key uniquely identifies an item in the table.
Step 2: Effect of inserting duplicate partition keys
Inserting an item with the same partition key overwrites the existing item regardless of other attribute differences.
Final Answer:
The second item overwrites the first item because the partition key is the same. -> Option D
Quick Check:
Partition key uniqueness enforced [OK]
Quick Trick:Same partition key means overwrite existing item [OK]
Common Mistakes:
Assuming different attributes create separate items
Thinking DynamoDB throws an error on duplicate keys
Believing DynamoDB auto-creates composite keys
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