SQL Query for adding previous row with current row

SQL Query for adding previous row with current row

Hi ZOHO Reports Team,

I have the following table (See attached) that has 5 columns and each column has 4 rows. 

I want to create a new Column that will add the value from Previous Row to the current row and display.

For Eg: 
For the column "Revenue Difference", the Rows should have the Formula like below:

Row 1: April 2017 :: (Budgeted Revenue - Actual Revenue) = "Revenue Difference Row 1"
Row 2:  August 2017 :: "Revenue Difference Row 1" + (Budgeted Revenue - Actual Revenue) = "Revenue Difference Row 2"
Row 3: June 2017 :: "Revenue Difference Row 2" + (Budgeted Revenue - Actual Revenue) = "Revenue Difference Row 3"
Row 4: May 2017 :: "Revenue Difference Row 3" + (Budgeted Revenue - Actual Revenue) = "Revenue Difference Row 4"

Can you please suggest me how to solve this using SQL Queries?

Please find attached the snapshot of the TABLE.

Thanks,
Sudhindra

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