Query from multiple "Not in" queries without using UNION
It's hard to make a good title for what I need.
This revolves around 3 tables and is an appointment booking system and I need to get a list of every doctor / nurse and time slots they are free.
I don't want to use UNION in the same way as the first sql below, this means I have to declare the names of each doctor, which I don't want to do.
ID Role Surname Clinic 1 Doctor House 1 2 Doctor Bob 1 3 Nurse Smith 1 4 Doctor Jim 2 5 Nurse Grant 2 6 Patient Billy 1 7 Patient Jones 1
ID TimeSlot 1 10:00 2 10:30 3 11:00 4 11:30 11 16:30 12 17:00
ID StaffID PatientID TimeSlot AppDate 1 1 6 1 today 2 1 7 3 today 3 2 6 2 today 4 1 6 4 tomorrow
(StaffID and PatientID is the foreign key identifier from the users table) I need a query that outputs every time slot and Doc / Nurse when they have no appointment to date (or any day based on "AppDate").
I can do this for a specific doctor / nurse:
SELECT TimeSlots.TimeSlot, Users.Role, Users.Surname, Users.Clinic FROM TimeSlots, Users WHERE TimeSlots.ID NOT IN (SELECT Appointments.TimeSlot FROM Appointments INNER JOIN Users ON Appointments.MedicalStaffID = Users.ID WHERE AppDate = CONVERT(DATE,GETDATE()) AND Users.Surname = 'House') AND Users.Surname = 'House' ORDER BY TimeSlots.TimeSlot;
Which gives me:
TimeSlot Role Surname Clinic 10:30 Doctor House 1 11:30 Doctor House 1 16:30 Doctor House 1 17:00 Doctor House 1
This is fine, but I need 1 query to display this for all doctors / nurses, so I have:
TimeSlot Role Surname Clinic 10:30 Doctor House 1 11:30 Doctor House 1 16:30 Doctor House 1 17:00 Doctor House 1 10:00 Doctor Bob 1 11:00 Doctor Bob 1 11:30 Doctor Bob 1 16:30 Doctor Bob 1 17:00 Doctor Bob 1
and therefore it can also be ordered by time.
I first tried working with:
SELECT TimeSlots.TimeSlot, Users.Role, Users.Surname, Users.Clinic FROM TimeSlots, Users WHERE TimeSlots.ID NOT IN (SELECT TimeSlot FROM Appointments WHERE AppDate = GETDATE() AND (Users.Clinic = 'Werrington') AND (Users.Role = 'Doctor' OR Users.Role = 'Nurse')) AND (Users.Role = 'Doctor' OR Users.Role = 'Nurse') AND (Users.Clinic = 'Werrington') ORDER BY TimeSlots.TimeSlot;
But it just outputs every Doctor with every Timeslot
On a side note, I feel like the best way to structure the look of the resulting table is not being able to think about how.
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If I understand the question correctly, this should give you what you want ...
SET NOCOUNT ON; DECLARE @UserDetails TABLE ( ID int, Role varchar(50), Surname varchar(50), Clinic int ) INSERT @UserDetails VALUES (1, 'Doctor', 'House', 1) INSERT @UserDetails VALUES (2, 'Doctor', 'Bob', 1) INSERT @UserDetails VALUES (3, 'Nurse', 'Smith', 1) INSERT @UserDetails VALUES (4, 'Doctor', 'Jim', 2) INSERT @UserDetails VALUES (5, 'Nurse', 'Grant', 2 ) INSERT @UserDetails VALUES (6, 'Patient', 'Billy', 1) INSERT @UserDetails VALUES (7, 'Patient', 'Jones', 1) DECLARE @TimeSlots TABLE ( ID int, TimeSlot varchar(50) ) INSERT @TimeSlots VALUES (1 , '10:00' ) INSERT @TimeSlots VALUES (2 , '10:30' ) INSERT @TimeSlots VALUES (3 , '11:00' ) INSERT @TimeSlots VALUES (4 , '11:30' ) INSERT @TimeSlots VALUES (11, '16:30' ) INSERT @TimeSlots VALUES (12, '17:00' ) DECLARE @Appointments TABLE ( ID int, StaffID int, PatientID int, TimeSlotID int, AppDate varchar(50) ) INSERT @Appointments VALUES (1, 1, 6, 1, 'today' ) INSERT @Appointments VALUES (2, 1, 7, 3, 'today' ) INSERT @Appointments VALUES (3, 2, 6, 2, 'today' ) INSERT @Appointments VALUES (4, 1, 6, 4, 'tomorrow' ) SET NOCOUNT OFF; WITH CompleteSchedule AS ( SELECT UD.ID as UserID, UD.Role, UD.Surname, UD.Clinic, TS.ID as TimeSlotID, TS.TimeSlot FROM @UserDetails UD CROSS JOIN @TimeSlots TS ) SELECT CS.* FROM CompleteSchedule CS LEFT JOIN @Appointments A ON A.StaffID = CS.UserID AND A.TimeSlotID = CS.TimeSlotID AND A.AppDate = 'today' WHERE A.ID is null ORDER BY CS.UserID, CS.TimeSlotID
The CTE will generate a "table" for every employee X every time slot. Then you Left Join that with your assigned for the given day. Any resulting string that does not have an appointment ID is an open timeslot.
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