Aggr? Just count first value in column

[Anonymous]

Hi All,

I have a list of data that I want to evaluate on just the minimum date value only. I have a list of people who have had tests performed, and these tests should be performed every day on each person during their visit. I want to be able to tell if the person had a test performed within 8 hours of arriving for their visit. If a person had has had multiple tests per visit, how do I just count the first test, and see if that was within 8 hours or arrival? Here's an example of the data:

Visit ID	Person ID	Arrival Date/Time	Test Date/Time	Interval	Less than 8 hours?
28704007	1148967	1/12/2015 20:54:58	1/12/2015 21:39:52	0.031180556	Yes
28704007	1148967	1/12/2015 20:54:58	4/12/2015 2:42:55	2.241631944	No
28704007	1148967	1/12/2015 20:54:58	5/12/2015 3:13:27	3.262835648	No
28693342	217067	1/12/2015 21:02:00	1/12/2015 22:46:04	0.072268519	Yes
28698114	431145	1/12/2015 21:23:22	2/12/2015 1:55:14	0.188796296	Yes
28706266	1152055	1/12/2015 21:47:55	4/12/2015 11:01:40	2.551215278	No
28698465	666648	1/12/2015 21:55:00	1/12/2015 23:35:57	0.070104167	Yes
28670716	874611	1/12/2015 22:16:05	2/12/2015 4:53:14	0.275798611	Yes

The count that I would want to achieve here is 5. Five people had a test within 8 hours of arrival (Person 1148967 had 3 tests, but the first one was performed within 8 hours). One did not. Do I perform this using the Aggr function? What would this look like? What if I create a new table in the load script with FirstValue?

Many thanks,

Glen

[qliksus]

You can use the below

count({<Person ID = {"=interval(test time - Arrival Time,'HH')<8"}>} Person ID )

[Anil_Babu_Samineni]

If you already calculated "Less than 8 hours" ??

Count({<[]Less than 8 hours = {Yes}>} [Person ID])

[Anil_Babu_Samineni · Accepted solution]

My bad?

Count({<[Less than 8 hours] = {Yes}>} [Person ID])

[Anonymous]

Perhaps I was overthinking this..