MissingBehavior

is an option to Query and related functions that specifies how expressions with head Missing should be interpreted in the context of other functions.

Details

The following settings can be given:
None use ordinary behavior of Missing

Automatic invoke special rules for Mean, Total, etc.
Special behavior invoked by the setting MissingBehavior->Automatic includes:

	Mean,Median,StandardDeviation,…	empty lists yield Missing["Indeterminate"]
	Total,Mean,Median,Min,Max,…	Missing elements are dropped or ignored
	Times,Minus,Power,…	Missing elements yield Missing["Indeterminate"]
	Counts,GroupBy,Map,…	application to a single Missing yields another Missing

The default behavior of functions like Query is to apply special rules:

Use the ordinary behavior of Missing:

Top

	None	use ordinary behavior of Missing
	Automatic	invoke special rules for Mean, Total, etc.