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For example, if I have a Postgres table with columns for sensor_id, temperature and time_recorded , would I still be able to generate a chart that shows temperature (y) over time (x) ?

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Yes, that's possible with 2 steps:

  1. defining a data schema for that table.
  2. define a query to get data from that data schema.

after retrieving the data you can feed it to the chart library of your choice.

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