so, i'll have to hardcode the VP value for each case? i could write a for loop? got some reading to do..
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Question
calculating percentages, with subtotals
Hi-
I want to get #complete, #incomplete, vp
i have table users, completes.
heres my non-working query:
select vp, COUNT(*) as [ALL By VP],
(Select count(*)
from users
join completes on Users.[User id] = completes.[user id]
where [Transcript Status] = 'Completed'
)
as [count compl] --totally innaccurate number
from users
group by vp
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Answers
thanks- any idea why i get 0 for my percentage?
select vp, COUNT(*) as [ALL By VP],
SUM(CASE [Transcript Status] WHEN 'Completed' THEN 1 ELSE 0 END) AS [count compl],
SUM(CASE [Transcript Status] WHEN 'Completed' THEN 0 ELSE 1 END) AS [count incompl],
(SUM(CASE [Transcript Status] WHEN 'Completed' THEN 1 ELSE 0 END) / count(*))*100 AS [percent compl]
from users u
left outer join completes c on u.[User id] = c.[user id]
group by vp
;
MS SQL Servers '/' operator will always do integer division on integers. It will not convert to decimal / fractional results like you may be use to with other programming languages (i.e., there is no separate integer division operator it is based on datatype of the operands).
With that said (hopefully clear), you have to ensure that the equation involves a non-integer. This is one of the ways to achieve that easily.
select vp, COUNT(*) as [ALL By VP],
SUM(CASE [Transcript Status] WHEN 'Completed' THEN 1 ELSE 0 END) AS [count compl],
SUM(CASE [Transcript Status] WHEN 'Completed' THEN 0 ELSE 1 END) AS [count incompl],
(SUM(CASE [Transcript Status] WHEN 'Completed' THEN 1 ELSE 0 END) * 100.0 / count(*)) AS [percent compl]
from users u
left outer join completes c on u.[User id] = c.[user id]
group by vp
;
If you want the result to certain decimal places, you can cast / convert and even round appropriately.
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by: tigin44Posted on 2009-11-05 at 06:35:54ID: 25749833
try this
select vp, count(*),
count(case when [Transcript Status] = 'Completed' then 1 else 0 end ) as Completed
from users
join completes on Users.[User id] = completes.[user id]