How to sum Total Time for each user in a while loop PHP

Question

I have this table (for example)

    id      userId     totalHours      isOt
    1       1          0830            1
    2       4          0630            0
    3       1          0730            0
    4       2          0900            1

I need to find the totalHours for each user but they should be shown once for each user (Group By)

And then, if the totalHours was awarded as OT (over time == 1) the difference between totalHours minus 0800 hours should be summed up too and shown in another column.

I have tried to join this table with user table but the loop seems so wrong which ended up totalling all last values in every loop to another.

Hope there will be anyone who can help and your help is appreciated

Answer 1

Do it in your database query, not PHP:

SELECT UserId,
       SUM(totalHours) AS totalTime,
       SUM(IF(isOt, totalhours-800, 0)) AS totalOt
FROM yourTable
GROUP BY UserId