I have a table that tracks leave days for each user:
ID | Start | End | IDUser 1 | 02-02-2020 | 03-02-2020 | 2 2 | 01-02-2020 | 21-02-2020 | 2
IDUser connects to the Users Table, that has IDUser and Username columns
I have a view / exhibition / query that shows the previous mentioned data PLUS a column named UsedDays that counts how many leave days were used:
DATEDIFF(DAY, dbo.leavedays.start, dbo.leavedays.[end]) + 1
This is what I have now:
Start | End | IDUser | UsedDays 02-02-2020 | 03-02-2020 | 2 | 1 01-02-2020 | 21-02-2020 | 1 | 20
Each user has a total available number of days per year so I would like to have a column that subtracts from those total possible days of each user, and show how many are left. Example:
John (IDUser = 2) has 30 days available this year and he already used 1, so there are 29 left
Start | End | IDUser | TotalDaysYear | UsedDays | LeftDays 02-02-2020 | 03-02-2020 | 2 | 30 | 1 | 29 01-02-2020 | 21-02-2020 | 1 | 20 | 20 | 0
I believe I have to create a table for TotalDaysYear, probably with:
ID | Year | TotalDaysYear | IDUser 1 | 2020 | 30 | 2 2 | 2020 | 20 | 1
IDUser connects to the Users Table, that has IDUser and Username columns
But I'm having trouble finding the logic for the relationship and how to find the result that I want, since it depends also on the year (available days may change per year, per user).
Can anyone give me a hand, please?
Thanks in advance