# Intervals Part 1 - Definitions and Terms

• Comments posted to this topic are about the item Intervals Part 1 - Definitions and Terms

J. Drew Allen

• I appreciate this work is six years old. But the diagram is not good.

I'd take this down and re-publish once the diagram is re-worked. Otherwise you're  better off just re-publishing James F Allen's work.

• With respect to the "Desired Month" interval in the following diagram (don't confuse with line # 3 or 6), what are lines 4 and 5 referred to as?

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

• Jeff Moden - Monday, March 12, 2018 8:08 AM

With respect to the "Desired Month" interval in the following diagram (don't confuse with line # 3 or 6), what are lines 4 and 5 referred to as?

Never mind.  Found it in the reference.  It's called an "OverLap".  Now I see what Gary was talking about above.  There is an "OverLap" in the diagram but it (and other things) are not depicted correctly.

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.