根据当前日期和配置数据获取记录

Question

我正在致力于在我的 Web 应用程序中自动化 SMS 发送部分。

SQL Fiddle Link

DurationType 表存储是否应按小时、天、周、月的间隔发送短信。在 SMSConfiguration 中引用

CREATE TABLE [dbo].[DurationType](
[Id] [int] NOT NULL PRIMARY KEY,
[DurationType] VARCHAR(10) NOT NULL
)

Bookings 表 包含原始 Bookings 数据。对于此预订，我需要根据配置发送 SMS。

短信配置。其中定义了发送自动 SMS 的配置。它可以在之前/之后发送。之前=0，之后=1。 DurationType can be Hours=1, Days=2, Weeks=3, Months=4

现在我需要根据短信配置集找出当前需要发送短信的预订列表。

尝试使用 UNION 的 SQL

DECLARE @currentTime smalldatetime = '2014-07-12 11:15:00'


-- 'SMS CONFIGURED FOR HOURS BASIS'

SELECT  B.Id AS BookingId, 
        B.StartTime AS BookingStartTime,@currentTime As CurrentTime,  SMS.SMSText
FROM    Bookings B INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
WHERE   (DATEDIFF(HOUR, @currentTime, B.StartTime) = SMS.Duration AND SMS.DurationType=1 AND BeforeAfter=0)
        OR
        (DATEDIFF(HOUR, B.StartTime, @currentTime) = SMS.Duration AND SMS.DurationType=1 AND BeforeAfter=1)


--'SMS CONFIGURED FOR DAYS BASIS'

UNION

SELECT  B.Id AS BookingId, 
        B.StartTime AS BookingStartTime,@currentTime As CurrentTime,  SMS.SMSText
FROM    Bookings B INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
WHERE (DATEDIFF(DAY, @currentTime, B.StartTime) = SMS.Duration AND SMS.DurationType=2 AND BeforeAfter=0)
        OR
      (DATEDIFF(DAY, B.StartTime, @currentTime) = SMS.Duration AND SMS.DurationType=2 AND BeforeAfter=1)
--'SMS CONFIGURED FOR WEEKS BASIS'

UNION

SELECT  B.Id AS BookingId, 
        B.StartTime AS BookingStartTime, @currentTime As CurrentTime, SMS.SMSText
FROM    Bookings B INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
WHERE (DATEDIFF(DAY, @currentTime, B.StartTime)/7 = SMS.Duration AND SMS.DurationType=3 AND BeforeAfter=0)
        OR
      (DATEDIFF(DAY, B.StartTime, @currentTime)/7 = SMS.Duration AND SMS.DurationType=3 AND BeforeAfter=1)
--'SMS CONFIGURED FOR MONTHS BASIS'

UNION

SELECT  B.Id AS BookingId, 
        B.StartTime AS BookingStartTime, @currentTime As CurrentTime, SMS.SMSText
FROM    Bookings B INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
WHERE   (dbo.FullMonthsSeparation(@currentTime, B.StartTime) = SMS.Duration AND SMS.DurationType=4 AND BeforeAfter=0)
         OR
        (dbo.FullMonthsSeparation(B.StartTime, @currentTime) = SMS.Duration AND SMS.DurationType=4 AND BeforeAfter=1)

结果

问题：

SQL 过程将每 15 分钟运行一次。当前查询即使在当前时间“2014-07-12 11:30:00”、“2014-07-12 11:45:00”等时也会继续返回天/周/月记录

我想要一个处理所有小时/天/周/月的查询 计算，我应该只在他们相遇时得到一次记录 正确的时间。否则我会一次又一次地发送短信 每 15 分钟匹配日/周/月记录。

应该考虑以下场景。

1. 小时，如果预订是同一天上午 10:15，如果在配置的 1 小时之前，则为上午 9:15

2. 天（24 小时差），如果预订是 10:15 A.M 第三天早上 10:15 A.M 如果在 SMSConfiguration 中配置 3 天后

3. 比赛周。如果预订时间是今天（星期三）上午 10:15，那么 14 天后的上午 10:15（如果配置为 2 周后）。

4. 月份也和上面一样。

Answer 1

试试简化版 FIDDLE ，去掉 Union 和使用 OR 条件

小时列表 - 每 15 分钟运行一次

DECLARE @currentTime smalldatetime = '2014-07-12 11:15:00'



SELECT  B.Id AS BookingId, C.Id, C.Name,
        B.StartTime AS BookingStartTime,@currentTime As CurrentTime,  SMS.SMSText
FROM    Bookings B INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
        LEFT JOIN Category C ON C.Id=B.CategoryId
WHERE   
        (DATEDIFF(MINUTE, @currentTime, B.StartTime) = SMS.Duration*60 AND SMS.DurationType=1 AND BeforeAfter=0)
        OR
        (DATEDIFF(MINUTE, B.StartTime, @currentTime) = SMS.Duration*60 AND SMS.DurationType=1 AND BeforeAfter=1)

Order BY B.Id

GO

天/周/月列表 - 每天早上运行一次

DECLARE @currentTime smalldatetime = '2014-07-12 08:00:00'

SELECT  B.Id AS BookingId, C.Id, C.Name,
        B.StartTime AS BookingStartTime,@currentTime As CurrentTime,  SMS.SMSText
FROM    Bookings B INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
        LEFT JOIN Category C ON C.Id=B.CategoryId
WHERE   
    (((DATEDIFF(DAY, @currentTime, B.StartTime) = SMS.Duration AND SMS.DurationType=2)
    OR (DATEDIFF(DAY, @currentTime, B.StartTime) = SMS.Duration*7 AND SMS.DurationType=3)
    OR (DATEDIFF(DAY, @currentTime, B.StartTime) = SMS.Duration*30 AND SMS.DurationType=4))
     AND BeforeAfter=0)

    OR
    (((DATEDIFF(DAY, B.StartTime, @currentTime) = SMS.Duration AND SMS.DurationType=2)
    OR (DATEDIFF(DAY, @currentTime, B.StartTime) = SMS.Duration*7 AND SMS.DurationType=3)
    OR (DATEDIFF(DAY, @currentTime, B.StartTime) = SMS.Duration*30 AND SMS.DurationType=4))
     AND BeforeAfter=1)

Order BY B.Id

Answer 2

您似乎忘记选择要返回的列。

DECLARE @currentTime smalldatetime = '2014-07-12 09:15:00'; 

SELECT [col1], [col2], [etcetera]
FROM

Bookings B
INNER JOIN SMSConfiguration SMS ON SMS.CategoryId=B.CategoryId
WHERE DATEDIFF(hour,B.StartTime,@currentTime)=1

Answer 3

这行得通

DECLARE @currentTime smalldatetime
set @currentTime= '2014-07-12 09:15:00'



SELECT B.CategoryId FROM
Bookings B
INNER JOIN SMSConfiguration SMS ON SMS.CategoryId=B.CategoryId
WHERE DATEDIFF(hh,B.StartTime,@currentTime)=1

你的 sql fiddle 有两个问题

1) 你没有设置currentTime的值

2) 您的选择语句中有列

注意：我将B.CategoryId作为获取记录的列之一，您可以根据需要更改它

Answer 4

只需swap the dates in DATEDIFF函数

将 DATEDIFF(hour, B.StartTime, @currentTime) 更改为 DATEDIFF(hour, @currentTime, B.StartTime) - 仅适用于 HOUR em>

因为你的返回值 Negative (-1)。

DECLARE @currentTime smalldatetime = '2014-07-12 09:15:00'

SELECT  B.Id AS BookingId, @currentTime AS CurrentTime,
        B.StartTime AS BookingStartTime,  SMS.SMSText
FROM    Bookings B INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
WHERE   (SMS.CategoryId IS NOT NULL AND 
         DATEDIFF(HOUR, @currentTime, B.StartTime) = SMS.Duration) OR 
        (SMS.CategoryId IS NULL AND 
         (DATEDIFF(DAY, B.StartTime, @currentTime) = SMS.Duration OR 
          DATEDIFF(MONTH, B.StartTime, @currentTime) = SMS.Duration))

Answer 5

您可以使用嵌套的 CASE 表达式在单个查询中获得结果。请试试这个，

    DECLARE @currentTime smalldatetime = '2014-07-12 11:15:00'





    SELECT  B.Id AS BookingId,
    SMS.Duration,
    B.StartTime AS BookingStartTime,
    @currentTime As CurrentTime,  
    SMS.SMSText
    FROM Bookings B INNER JOIN
    SMSConfiguration SMS 
    ON SMS.CategoryId = B.CategoryId 
    OR SMS.CategoryId IS NULL


    WHERE 
       SMS.Duration = 
       CASE 
       WHEN SMS.DurationType = 1 THEN  --'SMS CONFIGURED FOR HOURS BASIS'


           CASE WHEN BeforeAfter = 0 THEN 
                DATEDIFF(HOUR, @currentTime, B.StartTime)       
           ELSE 
                DATEDIFF(HOUR, B.StartTime, @currentTime)
           END 

       WHEN SMS.DurationType = 2 THEN  --'SMS CONFIGURED FOR DAY BASIS'


           CASE WHEN BeforeAfter = 0 THEN 
              DATEDIFF(DAY, @currentTime, B.StartTime)         
          ELSE 
              DATEDIFF(DAY, B.StartTime, @currentTime)
          END 

     WHEN SMS.DurationType = 3 THEN  --'SMS CONFIGURED FOR WEEK BASIS'


          CASE WHEN BeforeAfter = 0 THEN 
              DATEDIFF(DAY, @currentTime, B.StartTime)/7        
          ELSE 
              DATEDIFF(DAY, B.StartTime, @currentTime)/7 
          END 

      ELSE 
          CASE WHEN BeforeAfter = 0 THEN -- 'SMS CONFIGURED FOR MONTH BASIS'
              dbo.FullMonthsSeparation(@currentTime, B.StartTime)        
          ELSE 
              dbo.FullMonthsSeparation(B.StartTime, @currentTime) 
          END    

      END 

    ORDER BY BOOKINGID;

您可以自动执行两种计划，一种用于获取每小时短信的预订详细信息，另一种用于获取每日/每周/每月预订详细信息。

Answer 6

试试：

DECLARE @currentTime smalldatetime = '2014-07-12 09:15:00'

SELECT  B.Id AS BookingId, 
        B.StartTime AS BookingStartTime,  
        @currentTime CURRENT_DT,
        SMS.SMSText
FROM    Bookings B INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
WHERE  (    SMS.DurationType = 1 
        AND @currentTime = DATEADD(HOUR, (2*SMS.BeforeAfter-1)*SMS.Duration, B.StartTime))
     OR 
       (    SMS.DurationType = 2
        AND @currentTime = DATEADD(DAY, (2*SMS.BeforeAfter-1)*SMS.Duration, B.StartTime))
     OR
       (    SMS.DurationType = 3
        AND @currentTime = DATEADD(WEEK, (2*SMS.BeforeAfter-1)*SMS.Duration, B.StartTime))
     OR
       (    SMS.DurationType = 4
        AND @currentTime = DATEADD(MONTH, (2*SMS.BeforeAfter-1)*SMS.Duration, B.StartTime))

2*SMS.BeforeAfter-1 将 Before(0) 转换为 -1，After(1) 转换为 1。因此，在 BookingStartTime 中添加或减去时间

[编辑]

上述解决方案应该可以与您的数据模型一起使用。下面我建议通过更改数据模型来简化解决方案。

选项 1：在元数据之前和之后更改

http://sqlfiddle.com/#!3/6e9e9/1

请使用Before = -1 和After = 1，而不是Before = 0 和After = 1。然后这些可以用来改变任何日期偏移的方向

例如：

INSERT INTO [dbo].[SMSConfiguration]
           ([CategoryId],[SMSText],[BeforeAfter],[Duration],[DurationType],[IsActive])
     VALUES
           (1,'Before 1 hour',-1,1,1,1)-- 

INSERT INTO [dbo].[SMSConfiguration]
           ([CategoryId],[SMSText],[BeforeAfter],[Duration],[DurationType],[IsActive])
     VALUES
           (NULL,'After 1 hour (no category id))',1,1,1,1)

更新查询：

DECLARE @currentTime smalldatetime = '2014-07-12 09:15:00'

SELECT  B.Id AS BookingId, 
        B.StartTime AS BookingStartTime,  
        @currentTime CURRENT_DT,
        SMS.SMSText
FROM    Bookings B INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
WHERE  (    SMS.DurationType = 1 
        AND @currentTime = DATEADD(HOUR, SMS.BeforeAfter*SMS.Duration, B.StartTime))
     OR 
       (    SMS.DurationType = 2
        AND @currentTime = DATEADD(DAY, SMS.BeforeAfter*SMS.Duration, B.StartTime))
     OR
       (    SMS.DurationType = 3
        AND @currentTime = DATEADD(WEEK, SMS.BeforeAfter*SMS.Duration, B.StartTime))
     OR
       (    SMS.DurationType = 4
        AND @currentTime = DATEADD(MONTH, SMS.BeforeAfter*SMS.Duration, B.StartTime))

选项 2：允许 30 天 = 1 个月

http://sqlfiddle.com/#!3/808cd/1

除了之前/之后的更改之外，如果 30 天的时间段足够接近代表一个月，那么所有持续时间类型都可以转换为小时。问题是您的客户在精度方面会有多特殊。如果您按照“提前 3 个月”的规定提前一两天，我认为您不会有很多抱怨。

所以你的 DurationType 表可能看起来像这样

CREATE TABLE [dbo].[DurationType](
[Id] [int] NOT NULL PRIMARY KEY,
[DurationType] VARCHAR(10) NOT NULL,
[HourConversion] [int] NOT NULL
)
GO

INSERT INTO [dbo].[DurationType]([Id],[DurationType],[HourConversion])
       VALUES(1,'Hours',1)
INSERT INTO [dbo].[DurationType]([Id],[DurationType],[HourConversion])
       VALUES(2,'Days',24)
INSERT INTO [dbo].[DurationType]([Id],[DurationType],[HourConversion])
       VALUES(3,'Weeks',24*7)
INSERT INTO [dbo].[DurationType]([Id],[DurationType],[HourConversion])
       VALUES(4,'Months',24*30)

通过这些更改，查询可以修改为：

DECLARE @currentTime smalldatetime = '2014-07-12 09:15:00'

SELECT  B.Id AS BookingId, 
        B.StartTime AS BookingStartTime,  
        @currentTime CURRENT_DT,
        SMS.SMSText
FROM    Bookings B 
INNER JOIN
        SMSConfiguration SMS ON SMS.CategoryId = B.CategoryId OR SMS.CategoryId IS NULL
INNER JOIN
        DurationType DT ON DT.Id = SMS.DurationType
WHERE  @currentTime = DATEADD(HOUR, SMS.BeforeAfter*SMS.Duration*DT.HourConversion, B.StartTime)