a blind man in a dark cellar looking for a black cat that isn't there
not again in all the world's turning will there be terrains so wild and barbarous to try whether the stuff of creation may be shaped to man's will or whether his own heart is not another kind of clay
What if we have certain values in a column (e.g. blanks/nulls) which should always be sorted to the end of the listing, regardless of whether the sort order is ascending or descending?