Need information on performing MinMaxScaler() on the data

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#1

During pre-processing data it is necessary to always perform MinMaxScaler() on the data? or When we have to perform MinMaxScaler() on the data?
Can MinMaxScaler() be performed on selected columns or we need to perform on all columns?

#2

Scaling is used to normalise a feature. It’s not necessary to perform MinMaxScaling during preprocessing. It’s better to use MinMaxScaling over StandardScaling when the distribution of a feature isn’t gaussian or feature falls within a bounded interval.
Ex: scaling an image. If you take an RGB image pixel value lies between 0-255. Since it’s a bounded interval, we do MinMaxScaling to normalise the image.

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