10-02 Key-Value Database
A key-value database is a type of non-relational database (NoSQL) that uses a simple key-value method to store data.
| Key | Value |
|---|---|
| Data | {species:android, rank:’lt commander'} |
| Worf | {species:klingon, rank:’lt commander'} |
| Ro Laren | {species:bajoran, affiliation:‘maquis’} |
- Key-values are dumb and fast
- They generally lack features like:
- relationships
- indexes
- aggregation
A simple key-value store will interpret data resembling a dictionary (aka Associative arrays or hash)
| Key (Name) | Species | Rank | Affiliation |
|---|---|---|---|
| Data | android | lt commander | |
| Worf | klingon | lt commander | |
| Ro Laren | bajoren | maquis |
- A key-value store can resemble tabular data BUT it does not necessarily have consistent columns per row (hence its schema-less)
- Due to their simple design they can scale well beyond a relational database