Sql Query Output Join with another table - sql

Question

I have a query which gives me the following output :
select
PD.ProductId, TotalCalls = COUNT(DISTINCT PD.LogId),
TrueCalls = COUNT(DISTINCT case when PD.ExceptionCode = ' ' then PD.LogId END),
ErrorCalls =COUNT(DISTINCT case when PD.ExceptionCode != ' ' then PD.LogId END),
PassPercentage = CONVERT(DECIMAL(10,1),100 - (CAST(COUNT(DISTINCT case when PD.ExceptionCode != ' ' then PD.LogId END) as float)/CAST(COUNT(PD.LogId) as float)*100))
from
Log P
INNER JOIN LogProduct PD ON P.LogId = PD.LogId
WHERE
(ResponseTime < '2013-09-28' and RequestTime > '2013-09-01')
Group By
PD.ProductId
It gives me the following output :
ProductId TotalCalls TrueCalls ErrorCalls PassPercentage
1 6 6 0 100.0
2 1 0 1 85.7
3 33 15 18 92.2
Now I have another Table :
Levels :
LevelId Min Max Bool ProductId
1 100 100 0 2
2 80 99 0 2
3 60 79 0 2
4 40 59 0 2
5 1 39 1 2
6 0 0 0 2
7 -1 -1 0 2
1 100 100 0 1
2 80 99 0 1
3 60 79 1 1
4 40 59 0 1
5 1 39 0 1
6 0 0 0 1
7 -1 -1 0 1
What I would like to do is compare the output of the first query and add a new LevelId column :
example :
I am looking for an output like this :
ProductId TotalCalls TrueCalls ErrorCalls PassPercentage LevelId
1 6 6 0 100.0 1
2 1 0 1 85.7 2
The logic here is that : I would like to compare the PassPercentage for each row for that particular product and find out which level it falls in .
In the example above : PassPercentage is 85.7 for product 2 . If you check the Levels table above for ProductId 2 ,
Level 2 should be chosen as 80 < 87.5 < 99
I cannot figure out How I can do this..
Please let me know how I go forward from here ... or give me ideas of what I ought to do ??

Answer 1

The query would look like
with stats as (
select
PD.ProductId, TotalCalls = COUNT(DISTINCT PD.LogId),
TrueCalls = COUNT(DISTINCT case when PD.ExceptionCode = ' ' then PD.LogId END),
ErrorCalls =COUNT(DISTINCT case when PD.ExceptionCode != ' ' then PD.LogId END),
PassPercentage = CONVERT(DECIMAL(10,1),100 - (CAST(COUNT(DISTINCT case when PD.ExceptionCode != ' ' then PD.LogId END) as float)/CAST(COUNT(PD.LogId) as float)*100))
from
Log P
INNER JOIN LogProduct PD ON P.LogId = PD.LogId
WHERE
(ResponseTime < '2013-09-28' and RequestTime > '2013-09-01')
Group By
PD.ProductId
)
select s.*, l.LevelId
from stats s
join levels l on l.ProductId = s.ProductId and s.PassPercentage between l.Min and l.Max