feature-scaling

问题 I need to formulate a mysql query to select values normalized this way: normalized = (value-min(values))/(max(values)-min(values)) My attempt looks like this: select Measurement_Values.Time, ((Measurement_Values.Value-min(Measurement_Values.Value))/(max(Measurement_Values.Value)-min(Measurement_Values.Value))) from Measurement_Values where Measurement_Values.Measure_ID = 49 and Measurement_Values.time >= '2020-05-30 00:00' but is obviously wrong as it returns only one value. Can you help me

问题 I need to formulate a mysql query to select values normalized this way: normalized = (value-min(values))/(max(values)-min(values)) My attempt looks like this: select Measurement_Values.Time, ((Measurement_Values.Value-min(Measurement_Values.Value))/(max(Measurement_Values.Value)-min(Measurement_Values.Value))) from Measurement_Values where Measurement_Values.Measure_ID = 49 and Measurement_Values.time >= '2020-05-30 00:00' but is obviously wrong as it returns only one value. Can you help me