Question

This query is designed to make a histogram with bin sizes of 50.

So as histograms go this means that there are 1013 objects with a count(*) between 0 and 49.

I would like to make the bin read like

0-49           1013
50-99          2147
100-149        1571

My attempt isn’t quit doing what I need

select interval + ' - '+interval*50-1 as bin,count(*) as number from
(

select  count(tblclaims.patientid) as counts, count(tblclaims.patientid)/50 as interval 
from tblclaims
inner join patient on patient.patientid=tblclaims.patientid
and patient.admissiondate = tblclaims.admissiondate
and patient.dischargedate=tblclaims.dischargedate
group by tblclaims.patientid


) as t
group by interval
order by bin

I know this is going to have cast the interval + ' - ' stuff as a varchar, but when I tried that things got way out of whack

Answer 1

if the only problem is casting, You have to cast every number part apart :

select cast(interval*50 as nvarchar(max)) + '-' + cast(interval*50+49 as nvarchar(max))