delete CHAR cols if there's only a single value, no string variation
Wondering how I can script something to look at all the columns to see if there's at least 2 different values and delete all the single-value cols? I have thousands of 'feature' cols, all character-type, but a noticeable amount of them only have a single record in them...aka the distribution level = 1. how to detect and delete 1-record cols?