Primary key

DynamoDB, being a key-value pair database, does not index on all given attributes for a given item; it only indexes on the primary key, which is a mandatory attribute for each item of the table.

DynamoDB supports two types of primary keys:

Hash primary key
Hash and range primary key

Hash primary key

Each DynamoDB table must have a hash primary key that is unique for each item. DynamoDB builds an unordered hash index on this key that allows us to uniquely identify any given item for a given table. So, while designing your table, you must choose an attribute that would have a unique value for each attribute. For example, while creating Person table, choosing Social Security Number (SSN) as a hash key would be a better option as compared to selecting a person's name as hash key, as there might be more than one person having the same name.

Hash and range primary key

Along with the hash key, DynamoDB also supports another primary key called range key, which can be used in combination...

Tech Concepts

Programming languages

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

Mastering DynamoDB

By : Tanmay Deshpande

Mastering DynamoDB

By: Tanmay Deshpande

Overview of this book

Primary key

Hash primary key

Hash and range primary key

Mastering DynamoDB

By : Tanmay Deshpande

Mastering DynamoDB

By: Tanmay Deshpande

Overview of this book

Primary key

Hash primary key

Hash and range primary key

Confirmation

Buy this book with your credits?

Submit Your Feedback

Create a Free Account To Continue Reading

Sign in to activate your 7-day free access