Formula for determining if two date columns fall within specific date range

[Igottabeme]

Let's say I have thousands of employees, but I need to determine who
worked for me during a particular date range, and all I have to go on
is their start date in one column and their end date in another
column.

If:

A1 contains beginning date of employment
B1 contains ending date of employment
C1 contains specified beginning date (criteria)
D1 contains specified ending date (criteria)

is there a formula to help make this determination?

 

[Biff]

What if the employees start date is before the specified start date and the
employees end date is within the specified date range (or vice versa)? Does
that count ?

Biff

 

[Fred Smith]

If this were me, I would create a helper column with the formula:

=if(or(and($c$1>a1,$c$1<b1),and($d$1>a1,$d$1<b1)),true,false)

The filter the True's.

I haven't tested the formula, so it may need some tweaking, but hopefully you
get the idea.