Question

在 2分钟区间内为每个类型获取总计数。

INPUT或表I：

所需输出

我正在努力查询，我怎样才能遍历每2分钟。

Answer 1

您需要创建一个日历表，然后加入它以获取组：

DECLARE @t TABLE(t TIME, tp INT, cn INT)

INSERT INTO @t VALUES
('00:00:01', 1, 1),
('00:00:15', 2, 1),
('00:00:16', 2, 1),
('00:00:17', 2, 1),
('00:01:59', 3, 1),
('00:01:59', 3, 1)

;WITH tally AS(SELECT TOP 720 DATEADD(mi, 2 * ROW_NUMBER() 
                  OVER(ORDER BY(SELECT NULL)) - 2, CAST('00:00:00' AS TIME)) AS starttime,
                              DATEADD(ss, -1, DATEADD(mi, 2 * ROW_NUMBER() 
                  OVER(ORDER BY(SELECT NULL)) , CAST('00:00:00' AS TIME))) AS endtime
               FROM (VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) t1(n)
               CROSS JOIN (VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) t2(n)
               CROSS JOIN (VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) t3(n))
SELECT ta.starttime, 
       ta.endtime, 
       t.tp, 
       SUM(t.cn) AS cn 
FROM @t t
JOIN tally ta ON t.t BETWEEN ta.starttime AND ta.endtime
GROUP BY t.tp, ta.starttime, ta.endtime

tally是你的日历表。 Top 720只需24小时。

输出：

starttime           endtime             tp  cn
00:00:00.0000000    00:01:59.0000000    1   1
00:00:00.0000000    00:01:59.0000000    2   3
00:00:00.0000000    00:01:59.0000000    3   2

如果要在每个时间组中包含所有类型，则可以执行以下操作：

;WITH tally AS(SELECT TOP 720 DATEADD(mi, 2 * ROW_NUMBER() 
                  OVER(ORDER BY(SELECT NULL)) - 2, CAST('00:00:00' AS TIME)) AS starttime,
                              DATEADD(ss, -1, DATEADD(mi, 2 * ROW_NUMBER() 
                  OVER(ORDER BY(SELECT NULL)) , CAST('00:00:00' AS TIME))) AS endtime
               FROM (VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) t1(n)
               CROSS JOIN (VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) t2(n)
               CROSS JOIN (VALUES(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) t3(n)),
      types AS(SELECT DISTINCT tp FROM @t)
SELECT ta.starttime, 
       ta.endtime, 
       tp.tp, 
       ISNULL(SUM(t.cn), 0) AS cn 
FROM tally ta 
CROSS JOIN types tp
LEFT JOIN @t t ON tp.tp = t.tp AND t.t BETWEEN ta.starttime AND ta.endtime
GROUP BY tp.tp, ta.starttime, ta.endtime
ORDER BY ta.starttime

Answer 2

您可以使用UNION ALL：

SELECT DISTINCT
   '00:00:00 - 00:01:59' AS [Time],
   [Type],
   SUM(Count) OVER(PARTITION BY [Type]) AS [Count]
FROM Your_Table
WHERE [Time] BETWEEN '00:00:00' AND '00:01:59'

UNION ALL

SELECT DISTINCT
   '00:02:00 - 00:02:59' AS [Time],
   [Type],
   SUM(Count) OVER(PARTITION BY [Type]) AS [Count]
FROM Your_Table
WHERE [Time] BETWEEN '00:02:00' AND '00:02:59'

UNION ALL

...

每隔2分钟获取每种类型的总计数

2 个答案: