Question

构建定期事件系统

效果很好。我尝试将叶子计划与calander中的重复事件进行集成以对其进行过滤。意味着我需要忽略重复事件，如果它们属于计划的休假日期。

这是我的请假详细信息架构

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

从日期'20140115 00:00:00'到'20140116 11:59:59' - ＆gt; 15t＆amp;第16天（2天）
从日期'20140120 00:00:00'到'20140125 11:59:59' - ＆gt; 20日至25日（6天）

我需要删除介于上述日期之间的行

查询

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

我的查询未过滤这些记录，并且由于LEFT JOIN而提供重复的条目。

Answer 1

左边连接到Leaves不起作用，因为连接中没有涉及日期。用新谓词替换左连接以删除不需要的行：

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)

这样就可以删除不需要的行和重复的行。

/丹尼尔

忽略日期范围的记录

1 个答案: