Chapter 7

Data Querying

graph LR;
  classDef highlight stroke:#000,stroke-width:4px
  direction LR
  Generation
  subgraph S [ ]
    Ingestion
    Transformation:::highlight
    Serving:::highlight
    Ingestion --> Transformation
    Transformation --> Serving
    Storage@{ shape: lin-cyl }
  end
  Generation --> Ingestion
  Serving --> Analytics:::highlight
  Serving --> ML(Machine Learning)
  Serving --> RETL(Reverse ETL)

In this chapter we’ll consider ways to query our consolidated data. A query is a way to ask questions to the data, to select a subset based on some filter, for instance particular attribute criteria must be met.

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