PHP & mySQL: do I keep the "Balance" column or dynamically generate it when necessary?

WHAT I ALREADY HAVE:

In my application, I have Credit and Debit columns. I am using the column type as Decimal 8.2 with a default value of 0.00 for both columns in the table. When a user receives a loan of, say, $ 50, the credit column receives a value of 50.00, and the debit is filled as 0.00.

WHAT IAM TRIES TO ACCEPT:

Now I also want to show the balance for the transaction in the third column, next to the Debit column in the interface. So, I am creating a new “Balance” column with the column type as Decimal 8.2, and the default value is 0.00 and just fills the balance as (credit debit) in my code? Or can I dynamically calculate balance values ​​every time a user visits this page? Which method would be best and why?

The latest transactions are displayed first. Here is an example of how I want my interface to work / look:

PK      Credit Debit Balance
3        0.00  20.00  35.00
2       10.00   5.00  55.00
1       50.00   0.00  50.00
Totals: 60.00  25.00  35.00    

PK is an automatic key, a primary key. What will be the code to output the output as above?

Thanks in advance.

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2 answers

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Source: https://habr.com/ru/post/1731699/


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