# Non-Scalar Data
https://joind.in/event/php-uk-conference-2019/storing-non-scalar-data
Derick Rethans

## Redis sets SSAD

- key binding - safe string
- sets of data
- taggable

## Document data stores
- Usually JSON
- Richer
- MongoDB - single master
- CouchDB - multi master
- ES - text search index

## MongoDB
- pecl/mongodb
- mongodb/mongodb

docs are PHP objects or assoc arrays

## Relational Database
- normalisation

- postgres
    - HSTORE
    - JSON/JSONB


# Querying data

Sets - SISMEMBER and SMEMBER
-  Aggregations
- buckets
- postgres - non standard

## Redis
- Can add to sets
- Atomic
- fast
- counters

DONT: RETRIVE MANIPULATE STORE

 Do we do this at d3R?

 redis bad at scaling

 joned.in/25887


# Useful links
https://redis.io/commands/sadd
https://www.postgresql.org/docs/9.1/hstore.html
https://wiki.openstreetmap.org/wiki/PostgreSQL
https://en.m.wikipedia.org/wiki/Benford%27s_law
https://php-ml.readthedocs.io/en/latest/machine-learning/workflow/pipeline/