mysql - MySQLと重複する時間間隔

Question

複数のリソース（Calendar＃1とCalendar＃2）を使用して予約システムを作成しようとしています。カレンダーには、重複する範囲自体は含まれていません。1つのカレンダーの範囲は、他のカレンダーの複数の範囲にまたがることができます。

以下またはsqlfiddleのスキーマとデータを参照してください

    Events on Calendar #1
        ID  startDate               endDate
        -----------------------------------------------
        1   2012-01-01 02:00:00     2012-01-01 03:00:00
        2   2012-01-01 05:00:00     2012-01-01 07:00:00
        3   2012-01-01 09:00:00     2012-01-01 11:00:00
        4   2012-01-01 16:00:00     2012-01-01 18:00:00
        5   2012-01-01 19:00:00     2012-01-01 22:00:00

        6   2012-02-02 10:00:00     2012-02-02 20:00:00

        7   2012-03-03 05:00:00     2012-03-03 07:00:00
        8   2012-03-03 09:00:00     2012-03-03 11:00:00
        9   2012-03-03 12:00:00     2012-03-03 14:00:00
        10  2012-03-03 15:00:00     2012-03-03 17:00:00
        11  2012-03-03 19:00:00     2012-03-03 21:00:00
        12  2012-03-03 22:00:00     2012-03-03 23:00:00

    Events on Calendar #2
        ID  startDate               endDate
        -----------------------------------------------
        1   2012-01-01 01:00:00     2012-01-01 04:00:00
        2   2012-01-01 06:00:00     2012-01-01 08:00:00
        3   2012-01-01 12:00:00     2012-01-01 14:00:00
        4   2012-01-01 15:00:00     2012-01-01 17:00:00
        5   2012-01-01 20:00:00     2012-01-01 21:00:00

        6   2012-02-02 05:00:00     2012-02-02 07:00:00
        7   2012-02-02 09:00:00     2012-02-02 11:00:00
        8   2012-02-02 12:00:00     2012-02-02 14:00:00
        9   2012-02-02 15:00:00     2012-02-02 17:00:00
        10  2012-02-02 19:00:00     2012-02-02 21:00:00
        11  2012-02-02 22:00:00     2012-02-02 23:00:00

        12  2012-03-03 10:00:00     2012-03-03 20:00:00


2012-01-01:
            0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3 
    Cal#1         |--|     |-----|     |-----|              |-----|  |--------|
    Cal#2      |--------|     |-----|           |-----|  |-----|        |--|

2012-02-02:
            0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3 
    Cal#1                                 |-----------------------------|
    Cal#2                  |-----|     |-----|  |-----|  |-----|     |-----|  |--|

2012-03-03:
            0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3 
    Cal#1                  |-----|     |-----|  |-----|  |-----|     |-----|  |--|
    Cal#2                                 |-----------------------------|

a）両方のカレンダーで見つかった間隔を取得する方法：

             startDate               endDate
             -----------------------------------------------
             2012-01-01 02:00:00     2012-01-01 03:00:00
             2012-01-01 06:00:00     2012-01-01 07:00:00
             2012-01-01 16:00:00     2012-01-01 17:00:00
             2012-01-01 20:00:00     2012-01-01 21:00:00

             2012-02-02 10:00:00     2012-02-02 11:00:00
             2012-02-02 12:00:00     2012-02-02 14:00:00
             2012-02-02 15:00:00     2012-02-02 17:00:00
             2012-02-02 19:00:00     2012-02-02 20:00:00

             2012-02-03 10:00:00     2012-02-03 11:00:00
             2012-02-03 12:00:00     2012-02-03 14:00:00
             2012-02-03 15:00:00     2012-02-03 17:00:00
             2012-02-03 19:00:00     2012-02-03 20:00:00

            0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3 
01  Cal#1&2       |--|        |--|                          |--|        |--|
02  Cal#1&2                               |--|  |-----|  |-----|     |--|
03  Cal#1&2                               |--|  |-----|  |-----|     |--|

b）＃1で見つかったが＃2では見つからなかった間隔を取得する方法：

             startDate               endDate
             -----------------------------------------------
             2012-01-01 05:00:00     2012-01-01 06:00:00
             2012-01-01 09:00:00     2012-01-01 11:00:00
             2012-01-01 17:00:00     2012-01-01 18:00:00
             2012-01-01 19:00:00     2012-01-01 20:00:00
             2012-01-01 21:00:00     2012-01-01 22:00:00

             2012-02-02 11:00:00     2012-02-02 12:00:00
             2012-02-02 14:00:00     2012-02-02 15:00:00
             2012-02-02 17:00:00     2012-02-02 19:00:00

             2012-03-03 05:00:00     2012-03-03 07:00:00
             2012-03-03 09:00:00     2012-03-03 10:00:00
             2012-03-03 20:00:00     2012-03-03 21:00:00
             2012-03-03 22:00:00     2012-03-03 23:00:00

            0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3 
01  Cal#1-2                |--|        |-----|                 |--|  |--|  |--|
02  Cal#1-2                                  |--|     |--|     |-----| 
03  Cal#1-2                |-----|     |--|                             |--|  |--|

c）カレンダー/間隔の範囲内または範囲外のどこかでSTARTとENDの間のどのカレンダーにも見られない間隔を取得する方法。

             startDate               endDate
             -----------------------------------------------
       START:2012-01-01 04:30:00     2012-01-01 05:00:00
             2012-01-01 08:00:00     2012-01-01 09:00:00
             2012-01-01 11:00:00     2012-01-01 12:00:00
             2012-01-01 14:00:00     2012-01-01 15:00:00
             2012-01-01 18:00:00     2012-01-01 19:00:00
             2012-01-01 22:00:00     2012-02-02 05:00:00
             2012-02-02 07:00:00     2012-02-02 09:00:00
             2012-02-02 21:00:00     2012-02-02 22:00:00
             2012-02-02 23:00:00     2012-03-03 05:00:00
             2012-03-03 07:00:00 END:2012-03-03 07:30:00

            0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3 
01  Cal-1-2              |-|        |--|     |--|     |--|        |--|        |------
02  Cal-1-2 ---------------|     |-----|                                   |--|  |---
03  Cal-1-2 ---------------|     |-END

score 1 · Accepted Answer

両方のカレンダーで見つかった間隔を取得する方法：

SELECT GREATEST(Cal1.startDate, Cal2.startDate) AS startDate,
          LEAST(Cal1.endDate  , Cal2.endDate  ) AS   endDate
FROM   Cal1 JOIN Cal2
    ON Cal2.startDate BETWEEN Cal1.startDate AND Cal1.endDate
    OR Cal1.startDate BETWEEN Cal2.startDate AND Cal2.endDate

＃1で見つかったが＃2では見つからなかった間隔を取得する方法：

  SELECT Cal1.startDate, Cal2.startDate AS endDate
  FROM   Cal1 JOIN Cal2
      ON Cal2.startDate BETWEEN Cal1.startDate AND Cal1.endDate
UNION ALL
  SELECT Cal2.endDate AS startDate, Cal1.endDate
  FROM   Cal1 JOIN Cal2
      ON Cal2.endDate   BETWEEN Cal1.startDate AND Cal1.endDate
UNION ALL
  SELECT Cal1.startDate, Cal1.endDate
  FROM   Cal1 LEFT JOIN Cal2
      ON Cal2.startDate BETWEEN Cal1.startDate AND Cal1.endDate
      OR Cal1.startDate BETWEEN Cal2.startDate AND Cal2.endDate
  WHERE  Cal2.ID IS NULL
ORDER BY startDate

STARTとENDの間のどのカレンダーにも見られない間隔を取得する方法：

SELECT   starts.d AS startDate, MIN(ends.d) AS endDate
FROM (
  SELECT @start AS d
UNION
  SELECT Cal1.endDate
  FROM   Cal1 LEFT JOIN Cal2
      ON Cal1.endDate BETWEEN Cal2.startDate AND Cal2.endDate
  WHERE  Cal1.endDate BETWEEN @start AND @end
     AND Cal2.ID IS NULL
UNION
  SELECT Cal2.endDate
  FROM   Cal1 RIGHT JOIN Cal2
      ON Cal2.endDate BETWEEN Cal1.startDate AND Cal1.endDate
  WHERE  Cal2.endDate BETWEEN @start AND @end
     AND Cal1.ID IS NULL
) starts JOIN (
  SELECT @end AS d
UNION
  SELECT Cal1.startDate
  FROM   Cal1 LEFT JOIN Cal2
      ON Cal1.startDate BETWEEN Cal2.startDate AND Cal2.endDate
  WHERE  Cal1.startDate BETWEEN @start AND @end
     AND Cal2.ID IS NULL
UNION
  SELECT Cal2.startDate
  FROM   Cal1 RIGHT JOIN Cal2
      ON Cal2.startDate BETWEEN Cal1.startDate AND Cal1.endDate
  WHERE  Cal2.startDate BETWEEN @start AND @end
     AND Cal1.ID IS NULL
) ends ON starts.d < ends.d
GROUP BY startDate

sqlfiddleでそれらを参照してください。

mysql - MySQLと重複する時間間隔

1 に答える 1

Related

Reference