I am using Sql Server 2012.
This is how I calculate the ratio of failures in an order:
31 Days Table 1 query
sum(CASE
WHEN (datediff(dd,serDATE,'2015-01-21')) >= 31 THEN 31
WHEN (datediff(dd,serDATE,'2015-01-21')) < 0 THEN 0
ELSE (datediff(dd,serDATE,'2015-01-21'))END) as 31days
1 . How do i loop and pass dates dynamically in the Datediff?
31 Failures Table 2 query
SUM(Case when sometable.FAILUREDATE BETWEEN dateadd(DAY,-31,CONVERT(DATETIME, '2015-01-21 23:59:00.0', 102))
AND CONVERT(DATETIME, '2015-01-21 23:59:00.0', 102)Then 1 Else 0 END) As Failures31,
31 Day Cal(Formula)
((365*(Convert(decimal (8,1),T2.Failures31)/T1.31day))) [31dayCal]
This works fine when done for a specific order.
I want a similar kind of calculation done for day wise and month wise.
2. what approach should I be using to achieve day wise and month wise calculation?
I do also have a table called Calender with the list of dates that i can use.
I would really appreciate any help regarding this..Thank you..
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