Ignore records with date range - sql

Question

Trying to build the recurring event system based on Display next event date and the SQL Fiddle
It works well. I tried integrating the leaves plan with the repeating events in the calander to filter it. Mean I need to ignore the repeat events if they fall under the planned leave date.
Here is my leave detail schema
CREATE TABLE dbo.Doctor
(
DoctorID TINYINT IDENTITY(1, 1) NOT NULL,
DoctorName VARCHAR(10) NOT NULL,
CONSTRAINT PK_Doctor_DoctorID PRIMARY KEY (DoctorID)
)
INSERT Doctor(DoctorName) VALUES ('Dr John')
CREATE TABLE dbo.Leaves
( LeaveID INT IDENTITY(1, 1) NOT NULL,
DoctorID TINYINT NOT NULL,
LeaveStartDateTime DATETIME2 NOT NULL,
LeaveEndDateTime DATETIME2 NULL,
CONSTRAINT PK_Leaves_LeaveID PRIMARY KEY (LeaveID),
CONSTRAINT FK_Leaves_DoctorID FOREIGN KEY (DoctorID) REFERENCES dbo.Doctor (DoctorID)
);
Leave Data
From Date '20140115 00:00:00' to '20140116 11:59:59' ->15t & 16th (2 days)
From Date '20140120 00:00:00' to '20140125 11:59:59' -> 20th-25th (6 days)
I need to remove rows which falls between dates mentioned above
The Query
WITH RepeatingEvents AS
( SELECT d.DoctorName,
l.LeaveStartDateTime,
l.LeaveEndDateTime,
e.Name,
re.StartDateTime,
re.EndDateTime,
re.TimesToRepeat,
RepeatEventDate = CAST(c.DateKey AS DATETIME) + CAST(re.StartTime AS DATETIME),
RepeatNumber = ROW_NUMBER() OVER(PARTITION BY re.RepeatEventID ORDER BY c.Datekey)
FROM dbo.Event e
INNER JOIN dbo.RepeatEvent re
ON e.EventID = re.EventID
INNER JOIN dbo.RepeatType rt
ON rt.RepeatTypeID = re.RepeatTypeID
INNER JOIN dbo.Calendar c
ON c.DateKey >= re.StartDate
INNER JOIN dbo.RepeatDayOfWeek rdw
ON rdw.RepeatEventID = re.RepeatEventID
AND rdw.DayNumberOfWeek = c.DayNumberOfWeek
INNER JOIN dbo.DoctorXEvent de ON e.EventID = de.EventID
INNER JOIN dbo.Doctor d ON d.DoctorID = de.DoctorID
LEFT JOIN dbo.Leaves l ON l.DoctorID = d.DoctorID
WHERE rt.Name = 'Weekly'
)
SELECT DoctorName, LeaveStartDateTime, LeaveEndDateTime,Name as EventName, StartDateTime, RepeatEventDate, RepeatNumber
FROM RepeatingEvents
WHERE (TimesToRepeat IS NULL OR RepeatNumber <= TimesToRepeat)
AND (EndDateTime IS NULL OR RepeatEventDate <= EndDateTime)
AND (RepeatEventDate NOT BETWEEN LeaveStartDateTime AND LeaveEndDateTime)
SQL FIDDLE DEMO
My query not filtering those records and also gives duplicate entries because of LEFT JOIN.

Answer 1

The left join to Leaves does not work since the dates are not involved in the join.
Replace the left join with a new predicate to remove unwanted rows:
AND NOT EXISTS
(SELECT 1 FROM Leaves l WHERE l.doctorId = d.doctorId
AND CAST(c.DateKey AS DATETIME) + CAST(re.StartTime AS DATETIME)
BETWEEN l.LeaveStartDateTime AND l.LeaveEndDateTime)
This way the unwanted rows, and the duplicates, are removed.
/Daniel