Question

我一直在寻找几天来修复我的Fullcalender上的重复活动问题。我最简单的方法是根据存储在表中的数据生成重复日期。

我过去没有使用过CTE查询。我需要的是生成天数的重复日期

每个星期一＆amp;星期四我们在办公室举行会议。在这种情况下，我将把开始日期= 2012-06-04 结束日期= 2012-06-31

现在我想生成一个SQL查询，它将显示从2012-06-04开始的所有日期 - 直到2012-08-31这个事件＆amp;其他事件，如果他们是否经常发生

EventID     Date          Title
1          2012-06-04     Project Meeting
1          2012-06-07     Project Meeting
1          2012-06-11     Project Meeting
1          2012-06-14     Project Meeting
1          2012-06-18     Project Meeting
1          2012-06-21     Project Meeting
1          2012-06-25     Project Meeting
1          2012-06-18     Project Meeting
2          2012-05-13     Meeting With Client
3          2012-06-25     Event 3

我能够理解我是如何实现这一目标的，我将非常感谢您的帮助，或者指出类似的例子。如果我能够正确生成此数据，那么我可以将这些日期与eventTitle一起发送到FullCalender控件以显示事件的日历，如下面的示例所示http://arshaw.com/fullcalendar/

如果有人愿意提供帮助，他可以从下面的sql创建表格和示例数据。这是MS SQL SERVER 2008 r2兼容，因为我使用了MS SQL 2008仅支持的数据类型

包含数据的架构

/****** Object:  Table [dbo].[EventCalender]    Script Date: 05/24/2012 20:18:00 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[EventCalender](
    [EventID] [int] IDENTITY(1,1) NOT NULL,
    [EventTitle] [nvarchar](900) NULL,
    [EventDetails] [nvarchar](max) NULL,
    [EventStartDate] [date] NOT NULL,
    [EventEndDate] [date] NULL,
    [EventStartTime] [time](0) NULL,
    [EventEndTime] [time](0) NULL,
    [EventRecurring] [bit] NULL,
    [EventEnumDays] [varchar](50) NULL,
    [EventBlockDate] [bit] NULL,
    [EventVisibleOnWebsite] [bit] NULL,
    [EventActive] [bit] NULL,
    [EventType] [nvarchar](200) NULL,
    [LanguageID] [int] NOT NULL,
    [EventCreatedOn] [date] NULL,
    [EventShowTime] [bit] NULL
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
SET IDENTITY_INSERT [dbo].[EventCalender] ON
INSERT [dbo].[EventCalender] ([EventID], [EventTitle], [EventDetails], [EventStartDate], [EventEndDate], [EventStartTime], [EventEndTime], [EventRecurring], [EventEnumDays], [EventBlockDate], [EventVisibleOnWebsite], [EventActive], [EventType], [LanguageID], [EventCreatedOn], [EventShowTime]) VALUES (1, N'Project Meeting', N'Every Monday, Thrusday', CAST(0xC1350B00 AS Date), CAST(0x19360B00 AS Date), CAST(0x00A08C0000000000 AS Time), CAST(0x00B8A10000000000 AS Time), 1, N'2,5,7', 0, 0, 1, N'EVENT', 1, CAST(0xB6350B00 AS Date), NULL)
INSERT [dbo].[EventCalender] ([EventID], [EventTitle], [EventDetails], [EventStartDate], [EventEndDate], [EventStartTime], [EventEndTime], [EventRecurring], [EventEnumDays], [EventBlockDate], [EventVisibleOnWebsite], [EventActive], [EventType], [LanguageID], [EventCreatedOn], [EventShowTime]) VALUES (2, N'Meeting With Client', N'Event Details 2', CAST(0xBA350B00 AS Date), CAST(0xBA350B00 AS Date), NULL, NULL, 0, NULL, 0, 0, 1, N'EVENT', 1, CAST(0xB6350B00 AS Date), NULL)
INSERT [dbo].[EventCalender] ([EventID], [EventTitle], [EventDetails], [EventStartDate], [EventEndDate], [EventStartTime], [EventEndTime], [EventRecurring], [EventEnumDays], [EventBlockDate], [EventVisibleOnWebsite], [EventActive], [EventType], [LanguageID], [EventCreatedOn], [EventShowTime]) VALUES (3, N'Event 3', N'Event Details 3', CAST(0xAB350B00 AS Date), CAST(0xAB350B00 AS Date), NULL, NULL, 0, NULL, 0, 0, 0, N'EVENT', 1, CAST(0xB6350B00 AS Date), 0)
INSERT [dbo].[EventCalender] ([EventID], [EventTitle], [EventDetails], [EventStartDate], [EventEndDate], [EventStartTime], [EventEndTime], [EventRecurring], [EventEnumDays], [EventBlockDate], [EventVisibleOnWebsite], [EventActive], [EventType], [LanguageID], [EventCreatedOn], [EventShowTime]) VALUES (5, N'Weekly Meeting', N'Weekly Event', CAST(0xA3350B00 AS Date), CAST(0x01380B00 AS Date), CAST(0x00D0B60000000000 AS Time), NULL, 1, N'2,', 0, 1, 1, N'ACTIVITY', 2, NULL, 0)
SET IDENTITY_INSERT [dbo].[EventCalender] OFF
/****** Object:  Default [DF_EventCalender_EventEndDate]    Script Date: 05/24/2012 20:18:00 ******/
ALTER TABLE [dbo].[EventCalender] ADD  CONSTRAINT [DF_EventCalender_EventEndDate]  DEFAULT (NULL) FOR [EventEndDate]
GO
/****** Object:  Default [DF_EventCalender_EventStartTime]    Script Date: 05/24/2012 20:18:00 ******/
ALTER TABLE [dbo].[EventCalender] ADD  CONSTRAINT [DF_EventCalender_EventStartTime]  DEFAULT (NULL) FOR [EventStartTime]
GO
/****** Object:  Default [DF_EventCalender_EventEndTime]    Script Date: 05/24/2012 20:18:00 ******/
ALTER TABLE [dbo].[EventCalender] ADD  CONSTRAINT [DF_EventCalender_EventEndTime]  DEFAULT (NULL) FOR [EventEndTime]
GO
/****** Object:  Default [DF_EventCalender_EventRecurring]    Script Date: 05/24/2012 20:18:00 ******/
ALTER TABLE [dbo].[EventCalender] ADD  CONSTRAINT [DF_EventCalender_EventRecurring]  DEFAULT ((0)) FOR [EventRecurring]
GO
/****** Object:  Default [DF_EventCalender_EventEnumDays]    Script Date: 05/24/2012 20:18:00 ******/
ALTER TABLE [dbo].[EventCalender] ADD  CONSTRAINT [DF_EventCalender_EventEnumDays]  DEFAULT (NULL) FOR [EventEnumDays]
GO
/****** Object:  Default [DF_EventCalender_EventBlockDate]    Script Date: 05/24/2012 20:18:00 ******/
ALTER TABLE [dbo].[EventCalender] ADD  CONSTRAINT [DF_EventCalender_EventBlockDate]  DEFAULT ((0)) FOR [EventBlockDate]
GO
/****** Object:  Default [DF_EventCalender_EventVisibleOnWebsite]    Script Date: 05/24/2012 20:18:00 ******/
ALTER TABLE [dbo].[EventCalender] ADD  CONSTRAINT [DF_EventCalender_EventVisibleOnWebsite]  DEFAULT ((0)) FOR [EventVisibleOnWebsite]
GO
/****** Object:  Default [DF_EventCalender_EventActive]    Script Date: 05/24/2012 20:18:00 ******/
ALTER TABLE [dbo].[EventCalender] ADD  CONSTRAINT [DF_EventCalender_EventActive]  DEFAULT ((0)) FOR [EventActive]
GO
/****** Object:  Default [DF_EventCalender_EventShowTime]    Script Date: 05/24/2012 20:18:00 ******/
ALTER TABLE [dbo].[EventCalender] ADD  CONSTRAINT [DF_EventCalender_EventShowTime]  DEFAULT ((0)) FOR [EventShowTime]
GO

Answer 1

这可以为您提供如何使用CTE创建重复日期的起点：

;with Dates as (
    select cast('2012-06-04' as date) as StartDate, cast('2012-08-31' as date) as EndDate
),
RecursiveCTE as (
    select StartDate, EndDate, StartDate as EventDate
    from Dates
    union all
    select StartDate, EndDate, dateadd(dd, 7, EventDate)
    from RecursiveCTE
    where dateadd(dd, 7, EventDate) < Enddate
)
select * from RecursiveCTE

<强>更新

使用您的架构和插入，这是一个递归CTE，它提供了所需的结果：

;with Calendar as (
    select EventID, EventTitle, EventStartDate, EventEndDate, EventEnumDays, EventRecurring, EventStartDate as PlannedDate
    from EventCalender
    where EventActive = 1
    union all
    select EventID, EventTitle, EventStartDate, EventEndDate, EventEnumDays, EventRecurring, dateadd(dd, 1, PlannedDate)
    from Calendar
    where EventRecurring = 1
        and dateadd(dd, 1, PlannedDate) <= EventEndDate
)
select EventID, PlannedDate as [Date], EventTitle
from Calendar
where ',' + EventEnumDays + ',' like '%,' + cast(datepart(dw, PlannedDate) as char(1)) + ',%'
    or EventEnumDays is null
order by EventID, PlannedDate
option (maxrecursion 0)

请注意，如果您想要包含每月或每年的活动，则必须进行一些修改（可能是案例/转换），因为我依赖于“星期几”（dw）这里的每周内容。

此外，递归CTE可以是one of the slowest methods of counting，这基本上就是我们在这里所做的。如果速度至关重要，tally table可能是更好的选择。

CTE MYSQL查询重复发生的事件

1 个答案: