25 lines
1.2 KiB
Markdown
25 lines
1.2 KiB
Markdown
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tags: knowledge, database, nosql, english
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# DynamoDB
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It's a [[NoSQL]] [[Database]] from [[AWS]]
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## Differences from SQL Database
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- Records of a table can have different fields
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- 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
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- 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)
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- So basically **partition keys** and **sort keys** determines how the table can be queried. This limitations is the tradeoff that makes [[DynamoDB]] fast.
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- There are some advantages with the connection management, I think it allows a lot more concurrent connections, but I don't know the details.
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## Use cases
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- High scalability
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- Better integration with serverless architecture, because of better connection management
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## What led to learning this
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Podcast: [Full Stack Radio: 139: Alex DeBrie - DynamoDB for Relational Database Diehards](https://fullstackradio.com/episodes/139-20f6bb42)
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