[Solved] summing values of a column based on id [closed]
First, I created a single table database to mimic the data structure: static void CreateAndSeedDatabase() { Context context = new Context(); TimeTracker entry1 = new TimeTracker() { UserId = 1, LoginTime = new DateTime(2000, 1, 1, 0, 0, 0), LogoutTime = new DateTime(2000, 1, 1, 1, 0, 0) }; TimeTracker entry2 = new TimeTracker() { … Read more