Sql : How to calculate table values using formula - sql

Question

Here is original Query :, it generates o/p with two columns name (label, count) :
label count
Fails 1
Pass 3
and here is query I wrote which generates above data
select r.pname as resolution
,lb.label
,count(r.pname) as occurences
from issuelink
inner join jiraissue p on issuelink.source = p.id
inner join jiraissue c on issuelink.destination = c.id
inner join issuelinktype t on issuelink.linktype = t.id
inner join resolution r on c.resolution = r.id
inner join issuestatus istat on p.issuestatus = istat.sequence
inner join label lb on c.id = lb.issue
where t.linkname = 'jira_subtask_link'
and p.pkey in (#pkey)
and c.issuetype in ('13')
and r.pname not in ('Fails Smoke Test - General Failure', 'Fails Smoke Test - New Firmware Available')
and label in ('SmokeTest', 'fullcert', 'bfv', 'papercert')
group by r.pname;
As per your suggestion I tried using cross function, however its throwing an error of "please check syntax":
select 100.0 * fail.cnt / (fail.cnt + pass.cnt) as c
from (
select r.pname as label
, count(r.pname) as cnt
from issuelink
inner join jiraissue p on issuelink.source = p.id
inner join jiraissue c on issuelink.destination = c.id
inner join issuelinktype t on issuelink.linktype = t.id
inner join resolution r on c.resolution = r.id
inner join issuestatus istat on p.issuestatus = istat.sequence
inner join label lb on c.id = lb.issue
where t.linkname = 'jira_subtask_link'
and p.pkey in ('SRPDTVTPV-3')
and c.issuetype in ('13')
and r.pname not in ('Fails Smoke Test - General Failure', 'Fails Smoke Test - New Firmware Available')
and label in ('SmokeTest', 'fullcert', 'bfv', 'papercert')
group by r.pname
) as fail
cross join
(
select r.pname as label
, count(r.pname) as cnt
from issuelink
inner join jiraissue p on issuelink.source = p.id
inner join jiraissue c on issuelink.destination = c.id
inner join issuelinktype t on issuelink.linktype = t.id
inner join resolution r on c.resolution = r.id
inner join issuestatus istat on p.issuestatus = istat.sequence
inner join label lb on c.id = lb.issue
where t.linkname = 'jira_subtask_link'
and p.pkey in ('SRPDTVTPV-3')
and c.issuetype in ('13')
and r.pname not in ('Fails Smoke Test - General Failure', 'Fails Smoke Test - New Firmware Available')
and label in ('SmokeTest', 'fullcert', 'bfv', 'papercert')
group by r.pname
) as pass
where fail.label = 'Fails Certification'
and pass.label = 'Passes Certification'

Answer 1

Here's one way using a cross join:
select 100.0 * a.count / (a.count + b.count) as c
from YourQuery a
cross join
YourQuery b
where a.label = 'a'
and b.label = 'b'
Here's another approach using aggregates, a bit more tricky but only uses YourQuery once:
select 100.0 * cnt_a / (cnt_a + cnt_b) as c
from (
select max(case when label = 'a' then count end) as cnt_a
, max(case when label = 'b' then count end) as cnt_b
from YourQuery
) as SubQueryAlias