Question

I have data in sql server table like the following:

  Slno  Revenue     Data        Loading
   1    8989898     10/07/12    Before Load
   2    2124124     10/07/12    After Load

I want to subtract both the values and display the result as percentage say “10%”

Please help with a correct query to compute the following

Thanks

Answer 1

select convert(varchar,((t.revenue - tt.revenue)*100)/(t.revenue)) +'%'   as value
from dbo.Table_1 t
inner join dbo.Table_1 tt on tt.data = t.data and t.loading = 'Before Load' and tt.loading = 'After Load'

this is under assumption that only one before load(and after load) exist for a single date