knowledge/DynamoDB.md

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tags: knowledge, database, nosql
---

# DynamoDB

It's a [[NoSQL]] [[Database]] from [[AWS]]

## Differences from SQL Database

- Records of a table can have different fields
- Tables can be partitioned using **partition keys**, I think you cannot query *fast* across different partitions. I think an analogy to **partition keys** would be like having a table across multiple databases in [[SQL]] Databases
- Tables also have **sort keys**, this determines how records are ordered, and you can only query contiguous records, I think you cannot filter nor change the order (maybe only reverse the default order)
- So basically **partition keys** and **sort keys** determines how the table can be queried. This limitations is the tradeoff that makes [[DynamoDB]] fast.
- There are some advantages with the connection management, I think it allows a lot more concurrent connections, but I don't know the details.

## Use cases

- High scalability
- Better integration with serverless architecture, because of better connection management

## What led to learning this

Podcast: [Full Stack Radio: 139: Alex DeBrie - DynamoDB for Relational Database Diehards](https://fullstackradio.com/episodes/139-20f6bb42)
Added tags 2020-10-01 01:56:22 +02:00			`---`
			`tags: knowledge, database, nosql`
			`---`

new: DynamoDB 2020-07-29 03:36:56 +02:00			`# DynamoDB`

			`It's a [[NoSQL]] [[Database]] from [[AWS]]`

			`## Differences from SQL Database`

			`- Records of a table can have different fields`
			`- Tables can be partitioned using partition keys, I think you cannot query fast across different partitions. I think an analogy to partition keys would be like having a table across multiple databases in [[SQL]] Databases`
			`- Tables also have sort keys, this determines how records are ordered, and you can only query contiguous records, I think you cannot filter nor change the order (maybe only reverse the default order)`
			`- So basically partition keys and sort keys determines how the table can be queried. This limitations is the tradeoff that makes [[DynamoDB]] fast.`
DynamoDB: improvements -> advantages 2020-08-04 19:51:35 +02:00			`- There are some advantages with the connection management, I think it allows a lot more concurrent connections, but I don't know the details.`
new: DynamoDB 2020-07-29 03:36:56 +02:00
			`## Use cases`

			`- High scalability`
			`- Better integration with serverless architecture, because of better connection management`

			`## What led to learning this`

Removed "bullet point" in "What lead to learn this" section 2020-10-01 02:21:34 +02:00			`Podcast: [Full Stack Radio: 139: Alex DeBrie - DynamoDB for Relational Database Diehards](https://fullstackradio.com/episodes/139-20f6bb42)`