Question

I need help for this complex sql statement. In a select query, I need to add a statement to a calculated field with this structure:

If Field1 = 'value1' then


If Field2 = 0 then FCalculated1 = FieldA * FieldB

else FCalculated1 = FieldA * FieldC

end

FCalculated2 = FCalculated1 * FieldA


else if Field1 = 'value2' then


If Field2 = 0 then FCalculated2 = FieldD * FieldB

else FCalculated2 = FieldD * FieldE

end

FCalculated1 = FCalculated2 / FieldA


end

Basically I need to nest one conditional within another and use a calculated field as the source of another field. Does anyone can help me?

Thank you!!!

Answer 1

Try this

declare @Field1 int
declare @Field2 int
declare @FCalculated1 int
declare @FCalculated2 int
declare @FieldA int
declare @FieldB int
declare @FieldC int
declare @FieldD int
declare @FieldE int
declare @Value1 int
declare @Value2 int

select @FCalculated2 = case
 when @Field1 = @Value1 then  case
  when @Field2 = 0 then @FieldA * @FieldB
  else @FieldA * @FieldC
  end * @FieldA
 when @Field1 = @Value2 then case
    when @Field2 = 0 then @FieldD * @FieldB
    else @FieldD * @FieldE
 end
end

select @FCalculated2

I mean I’ve used variables to get it to compile and test, just swap out the @ signs for your column names