The type of coalesce(x_1, 0) - coalesce(x_2, 0) as the engine types it
(PLAN §11.7 Q5): Integer for the integer family, Float for the float family
(the zero written 0.0), Number for decimals and Number itself ✅;
undefined for a type that isn't numeric
The type of
coalesce(x_1, 0) - coalesce(x_2, 0)as the engine types it (PLAN §11.7 Q5): Integer for the integer family, Float for the float family (the zero written0.0), Number for decimals and Number itself ✅;undefinedfor a type that isn't numeric