Question

How can I add up values in a SQL column? I have the table set up in xampp and I’m trying to add up all the values in a column titled “gross”.

Answer 1

SQL Server or MySQL:

select sum(MyColumn) as MyColumnSum from MyTable

If you need to sum a column by a grouping of another column

select sum(MyColumn) as MyColumnSum, OtherColumn from MyTable Group By OtherColumn

Here is a way to, separately, add up negative or positive numbers

select
  sum( case when MyColumn < 0 then MyColumn else 0 end ) as NegativeSum,
  sum( case when MyColumn > 0 then MyColumn else 0 end ) as PositiveSum
from
  MyTable

Reference

• MySQL Reference for SUM()