SELECT m.id, m.timestamp, m.id_logger, m.id_sensor, s.bezeichnung, m.wert, s.einheit, m.messzeit FROM messwerte m LEFT JOIN sensor s USING (id_sensor) where (m.timestamp >='2025-12-10 00:00:00') and (m.timestamp <='2025-12-11 23:59:59') and (m.id_sensor = 'Reservoir' ) ORDER BY m.id;
Highcharts has extensive support for time series, and will adapt
intelligently to the input data. Click and drag in the chart to zoom in
and inspect the data.