sql server - Adding and multiplying tables' data by values in another table -


Say I have a table of sort lines and divisions according to the date: 

  tblFactors dt Sub Divide 2014-07-01 1 1 2014-06-01 0 5 2014-05-01 2 1 2014-05-01 0 3 I have one of the ordered values ​​according to the date And the essence is:  
  tblValues ​​DT Val 2014-07-05 4 2014-06-15 5 2014-05-15 21 2014-04-14 31 2014-03-15 71 < / Code> 
 
 I need to do some sequential calculation for the first value in I  tblFactors , I would have to deduct 1 from each  val  where  tblValues.dt & lt; '2014-07-01'.  
 Next, I need to process the second row in  tblFactors  I subtract nothing. However,  divided = 5  means that I Each  val  needs to be divided by 5 where  tblValues.dt & lt; '2014-06-01'. The hard thing is that I need to split it on the modified wall (not the 20/5, 21/5) from the first row.  
   
 
 
 
 
 
 
 
 Void subtraction 1 divided by 5 minus 2 divide 3 7/5/2014 4 6 / 15/2014 5 4/15/15 21 21 4 4/14/2014 31 30 6 4 3/25/2014 71 70 14 12 4

This will leave me: 

  qryValues ​​DT Val 2014-07-05 4 2014-06-15 4 2014-05-15 4 2014 -04-14 4 2014-03-15 4

Right now I am increasing the vector times on the loop in R . I was thinking that there is a smart way to accomplish this in the original SQL. I tried to do some aggregation, but I got limited success.


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