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     <h3 id="time-series-database">Time series database</h3>
+    <p>In order to build up a history of all measured and reported temperature values and make this history accessible in an
+optimized way for asking advanced queries (e.g. using filtering, aggregation, grouping and downsampling), a time series
+database is the obvious choice to store data in an optimized way.</p>
+    <p>You can create another connection in Ditto, additionally to the MQTT connection which sends data to Streamsheets.
+But this time, using an HTTP outbound connection. As Ditto supports formatting the outbound data with a JavaScript
+snippet too, it is easy to generate a <a href="">CloudEvent</a> from the Ditto change event.</p>
+    <p>Directing the CloudEvent towards a <a href="">Knative</a> service, changes can be pushed directly into a
+<a href="">TimescaleDB</a> instance, using the <a href="">serverless function for pushing to PostgreSQL</a> (of course you can also push to other time series database with that approach,
+or even to other serverless functions or services, which accept CloudEvents).</p>
+    <p>Finishing up by creating a nice dashboard with <a href="">Grafana</a>, based on this data.</p>
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