How to implement a table in MySQL?

Question

MySQL

Let's say I have a table in excel as shown in the picture.

There is a column Sum, for which the value is calculated by the formula "=B3+B4", and the value of the column is equal for each row.
How can I make it so that there is no duplicate value for each row in the database?
An example of what it looks like in the database:

You probably ask yourself why I need this ...
I have data in Excel that I will need to display this data on the site in tables (primefaces). And to take the data should from .

Answer 1

Store B3 and B4 in the plate, and calculate the amount later, after filling, on the client.
Or a separate request to the database.
(Do you know what relational databases are? no? you need to read, kmk.)