Which are the SQL improvements you are waiting for?

Question

Dealing with SQL shows us some limitations and gives us an opportunity to imagine what could be.

Which improvements to SQL are you waiting for? Which would you put on t

Answer 1

Operator to manage range of dates (or numbers):

where interval(date0, date1) intersects interval(date3, date4) 

EDIT: Date or numbers, of course are the same.

EDIT 2: It seems Oracle have something to go, the undocumented OVERLAPS predicate. More info here.