您的第一步是获取每个活动的活动开始日期和重复间隔，为此您可以使用：
SELECT EventID = e.ID,
e.Name,
StartDateTime = DATEADD(SECOND, rs.Meta_Value, '19700101'),
RepeatInterval = ri.Meta_Value
FROM dbo.Events e
INNER JOIN dbo.Events_Meta rs
ON rs.Event_ID = e.ID
AND rs.Meta_Key = 'repeat_start'
INNER JOIN dbo.Events_Meta ri
ON ri.Event_ID = e.ID
AND ri.Meta_Key = 'repeat_interval_' + CAST(e.ID AS VARCHAR(10));
这给出了：
EventID | Name | StartDateTime | RepeatInterval
--------+--------------+---------------------+-----------------
1 | Billa Vist | 2014-01-03 10:00:00 | 604800
1 | Billa Vist | 2014-01-04 18:00:00 | 604800
要重复此操作，您需要一个数字表来交叉连接，如果您没有，有多种方法可以即时生成一个，为简单起见，我将使用：
WITH Numbers AS
( SELECT Number = ROW_NUMBER() OVER(ORDER BY a.object_id) - 1
FROM sys.all_objects a
)
SELECT Number
FROM Numbers;
为了进一步阅读，Aaron Bertrand 已经对生成顺序数字列表的一些方法进行了深入比较：
如果我们将数字表限制为仅 0 - 5，并且只查看第一个事件，则将两者交叉连接会得到：
EventID | Name | StartDateTime | RepeatInterval | Number
--------+--------------+---------------------+----------------+---------
1 | Billa Vist | 2014-01-03 10:00:00 | 604800 | 0
1 | Billa Vist | 2014-01-03 10:00:00 | 604800 | 1
1 | Billa Vist | 2014-01-03 10:00:00 | 604800 | 2
1 | Billa Vist | 2014-01-03 10:00:00 | 604800 | 3
1 | Billa Vist | 2014-01-03 10:00:00 | 604800 | 4
1 | Billa Vist | 2014-01-03 10:00:00 | 604800 | 5
然后您可以通过将RepeatInterval * Number 添加到事件开始时间来获取您的发生：
DECLARE @EndDate DATETIME = '20140130';
WITH EventData AS
( SELECT EventID = e.ID,
e.Name,
StartDateTime = DATEADD(SECOND, rs.Meta_Value, '19700101'),
RepeatInterval = ri.Meta_Value
FROM dbo.Events e
INNER JOIN dbo.Events_Meta rs
ON rs.Event_ID = e.ID
AND rs.Meta_Key = 'repeat_start'
INNER JOIN dbo.Events_Meta ri
ON ri.Event_ID = e.ID
AND ri.Meta_Key = 'repeat_interval_' + CAST(rs.ID AS VARCHAR(10))
), Numbers AS
( SELECT Number = ROW_NUMBER() OVER(ORDER BY a.object_id) - 1
FROM sys.all_objects a
)
SELECT e.EventID,
e.Name,
EventDate = DATEADD(SECOND, n.Number * e.RepeatInterval, e.StartDateTime)
FROM EventData e
CROSS JOIN Numbers n
WHERE DATEADD(SECOND, n.Number * e.RepeatInterval, e.StartDateTime) < @EndDate
ORDER BY e.EventID, EventDate;
这给出了您的预期输出：
EVENTID | NAME | EVENTDATE
--------+---------------+--------------------------------
1 | Billa Vist | January, 03 2014 10:00:00+0000
1 | Billa Vist | January, 04 2014 18:00:00+0000
1 | Billa Vist | January, 10 2014 10:00:00+0000
1 | Billa Vist | January, 11 2014 18:00:00+0000
1 | Billa Vist | January, 17 2014 10:00:00+0000
1 | Billa Vist | January, 18 2014 18:00:00+0000
1 | Billa Vist | January, 24 2014 10:00:00+0000
1 | Billa Vist | January, 25 2014 18:00:00+0000
Example on SQL Fiddle
我认为你的架构是有问题的，加入：
Meta_Key = 'repeat_interval_' + CAST(rs.ID AS VARCHAR(10))
充其量是脆弱的。我认为将开始日期和与之关联的重复间隔存储在一起会更好：
CREATE TABLE dbo.Events_Meta
( ID INT IDENTITY(1, 1) NOT NULL,
Event_ID INT NOT NULL,
StartDateTime DATETIME2 NOT NULL,
IntervalRepeat INT NULL, -- NULLABLE FOR SINGLE EVENTS
RepeatEndDate DATETIME2 NULL, -- NULLABLE FOR EVENTS THAT NEVER END
CONSTRAINT PK_Events_Meta__ID PRIMARY KEY (ID),
CONSTRAINT FK_Events_Meta__Event_ID FOREIGN KEY (Event_ID) REFERENCES dbo.Events (ID)
);
这会将您的数据简化为：
EventID | StartDateTime | RepeatInterval | RepeatEndDate
--------+---------------------+----------------+---------------
1 | 2014-01-03 10:00:00 | 604800 | NULL
1 | 2014-01-04 18:00:00 | 604800 | NULL
它还允许您为重复添加结束日期，即，如果您只希望它重复一周。然后，您的查询将简化为：
DECLARE @EndDate DATETIME = '20140130';
WITH Numbers AS
( SELECT Number = ROW_NUMBER() OVER(ORDER BY a.object_id) - 1
FROM sys.all_objects a
)
SELECT e.ID,
e.Name,
EventDate = DATEADD(SECOND, n.Number * em.IntervalRepeat, em.StartDateTime)
FROM Events e
INNER JOIN Events_Meta em
ON em.Event_ID = e.ID
CROSS JOIN Numbers n
WHERE DATEADD(SECOND, n.Number * em.IntervalRepeat, em.StartDateTime) <= @EndDate
AND ( DATEADD(SECOND, n.Number * em.IntervalRepeat, em.StartDateTime) <= em.RepeatEndDate
OR em.RepeatEndDate IS NULL
)
ORDER BY EventDate;
Example on SQL Fiddle
我不会向您提供我过去如何实现这一目标的完整架构，但我会给出一个非常精简的示例，希望您可以从中构建自己的示例。我只会为每周一至周五发生的事件添加一个示例：
在上面的 ER RepeatEvent 中存储了重复事件的基本信息，然后根据重复类型（每日、每周、每月）填充一个或多个其他表。在每周事件的示例中，它将在表RepeatDay 中存储它重复的一周中的所有天。如果这需要仅限于某些月份，您可以将这些月份存储在 RepeatMonth 中，依此类推。
然后使用日历表，您可以获得第一个日期之后的所有可能日期，并将这些日期限制为仅与一周中的某天/一年中的某月等匹配的日期：
WITH RepeatingEvents AS
( SELECT 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
WHERE rt.Name = 'Weekly'
)
SELECT Name, StartDateTime, RepeatEventDate, RepeatNumber
FROM RepeatingEvents
WHERE (TimesToRepeat IS NULL OR RepeatNumber <= TimesToRepeat)
AND (EndDateTime IS NULL OR RepeatEventDate <= EndDateTime);
Example on SQL Fiddle
这只是我如何实现它的一个非常基本的表示，例如，我实际上完全使用视图来查看重复数据的任何查询，以便假定 RepeatDayOfWeek 中没有条目的任何事件每天都重复，而不是绝不。连同此答案和其他答案中的所有其他详细信息，您应该有足够的信息来帮助您入门。