Coding Issue

The following code confuses me as it all seems to reference the same thing.

$searchWADAtimes_1->setSearch(array("type"=>"Value", "comparison"=>"IS NOT", "join"=>"AND"), array("times.internalRating"), "s", "" .(isset($_GET["excludeRS5"])?"NULL":"") ."");
$searchWADAtimes_1->setSearch(array("type"=>"Value", "comparison"=>"<>", "join"=>"AND"), array("times.internalRating"), "s", "" .(isset($_GET["excludeRS5"])?"WA_BLANK":"") ."");
$searchWADAtimes_1->setSearch(array("type"=>"Edit", "comparison"=>"<>", "join"=>"AND"), array("times.internalRating"), "s", "excludeRS5");

On RSAVVY, under TIME MANAGEMENT > SEARCH there is a "With Rating" checkbox. All appears to be working fine, I'm just not sure why all that is needed and if something doesn't need to be there. What I am trying to do is create an opposite of that "Without Rating" whereas if it's not checked, it gives everything. The checkbox would now be excludeRS7. So I guess the question is tow fold. How would I create the opposite and why all that extra stuff, do I need it all?

It looks like the second and third rows are repeats and wouldn't both need to be there. The first and second row make more sense because the first one accounts for null in the column.

OK so I figured it out. So how do I make it return the opposite?
This returns anything that has a internalRating:

$searchWADAtimes_1->setSearch(array("type"=>"Value", "comparison"=>"<>", "join"=>"AND"), array("times.internalRating"), "s", "" .(isset($_GET["excludeRS5"])?"WA_BLANK":"")  ."");

I've created a checkbox that says Without Rating, which is "excludeRS7"

If you change:
"comparison"=>"<>"

to:
"comparison"=>"="

That should be the opposite.

One would think, however, if I do a search on Time Management, and select 2019-05-01 to 2019-05-01 I come up with 105 records. If I do "With Rating" I get 8 records. If I do "Without Rating" I get 10 records. The opposite should be 96 records.

The search wasn't accounting for NULL values. I've updated the page to fix the problem.

Thank you sir.