Hi collegues,
I've got this data table and I want to get the sum result shown in the last column called sum, in which I have performed the sum of each column values for a single row:
| year | state_1 | state_2 | state_3 | sum |
| 1980 | 40 | 10 | 20 | 70 |
| 1981 | 20 | 30 | 10 | 60 |
| 1982 | 50 | 20 | 40 | 110 |
| 1983 | 10 | 10 | 50 | 70 |
How can I perform it? Thanks in advance.
-Giulio