Question

我对SQL不太熟悉，因为我正在寻求专业人士的帮助：）

我有这样的声明，用％来计算交易的不成功比例，但它是整天做的问题是：如何更改语句，以便每15分钟返回不成功比率的最大值？要查看每15分钟的百分比，以便了解哪个区间是最大的不成功交易。

声明在这里：

Answer 1

我不知道你想要的确切输出是什么，但我想你可以从这开始。

;WITH mCTE AS (
  SELECT p.*, CASE WHEN DATEPART(MINUTE, p.server_time) >=0 AND DATEPART(MINUTE, p.server_time) < 15 THEN '0...14' 
                   WHEN DATEPART(MINUTE, p.server_time) >=15 AND DATEPART(MINUTE, p.server_time) < 30 THEN '15...29'
                   WHEN DATEPART(MINUTE, p.server_time) >=30 AND DATEPART(MINUTE, p.server_time) < 45 THEN '30...44'
                   WHEN DATEPART(MINUTE, p.server_time) >=45 AND DATEPART(MINUTE, p.server_time) < 60 THEN '45...59'
              END AS mRange
  FROM payments AS p )

SELECT CONVERT(DATE, GETDATE()) AS ReportDate, 
   YEAR(p.server_time) AS ServerYear, 
   MONTH(p.server_time) AS ServerMonth, 
   DAY(p.server_time) AS ServerDay, 
   DATEPART(HOUR, p.server_time) AS ServerHour, 
   p.mRange AS ServerMinuteRange, 
   COUNT(p2._total) / NULLIF(COUNT(p1._total) / 100.0, 0.0) AS Ratio
FROM mCTE AS p
LEFT OUTER JOIN mCTE AS p1 ON p.row_id = p1.row_id AND (p._state / 1000) <> 0
LEFT OUTER JOIN mCTE AS p2 ON p.row_id = p2.row_id AND (p._state / 1000) = 1 AND p2.row_id IS NOT NULL
WHERE CONVERT(DATE, p.server_time) = CONVERT(DATE, GETDATE())
GROUP BY YEAR(p.server_time), MONTH(p.server_time), DAY(p.server_time), DATEPART(HOUR, p.server_time), p.mRange

结果

ReportDate  ServerYear  ServerMonth  ServerDay  ServerHour  ServerMinuteRange  Ratio
2017-04-27  2017        4            27         13          0...14             0.000000000000000000
2017-04-27  2017        4            27         13          15...29            18.181818181818181818
2017-04-27  2017        4            27         13          30...44            0.000000000000000000
2017-04-27  2017        4            27         13          45...59            0.000000000000000000
2017-04-27  2017        4            27         14          0...14             18.181818181818181818
2017-04-27  2017        4            27         14          15...29            0.000000000000000000
2017-04-27  2017        4            27         14          30...44            0.000000000000000000
2017-04-27  2017        4            27         14          45...59            0.000000000000000000
2017-04-27  2017        4            27         15          0...14             0.000000000000000000
2017-04-27  2017        4            27         15          15...29            0.000000000000000000
2017-04-27  2017        4            27         15          30...44            0.000000000000000000
2017-04-27  2017        4            27         15          45...59            0.000000000000000000
2017-04-27  2017        4            27         16          0...14             0.000000000000000000
2017-04-27  2017        4            27         16          15...29            0.000000000000000000

<强>更新

每三个小时，只需更改CTE中的逻辑并从group by子句中删除分钟

;WITH mCTE AS (
   SELECT p.*, CASE WHEN DATEPART(HOUR, p.server_time) >=0 AND DATEPART(HOUR, p.server_time) < 3 THEN '0...2' 
               WHEN DATEPART(HOUR, p.server_time) >= 3 AND DATEPART(HOUR, p.server_time) < 6 THEN '3...5'
               WHEN DATEPART(HOUR, p.server_time) >= 6 AND DATEPART(HOUR, p.server_time) < 9 THEN '6...8'
               WHEN DATEPART(HOUR, p.server_time) >= 9 AND DATEPART(HOUR, p.server_time) < 12 THEN '9...11'
               WHEN DATEPART(HOUR, p.server_time) >= 12 AND DATEPART(HOUR, p.server_time) < 15 THEN '12...14'
               WHEN DATEPART(HOUR, p.server_time) >= 15 AND DATEPART(HOUR, p.server_time) < 18 THEN '15...17'
               WHEN DATEPART(HOUR, p.server_time) >= 18 AND DATEPART(HOUR, p.server_time) < 21 THEN '18...20'
               WHEN DATEPART(HOUR, p.server_time) >= 21 AND DATEPART(HOUR, p.server_time) < 24 THEN '21...23'
          END AS mRange
   FROM payments AS p )

SELECT CONVERT(DATE, GETDATE()) AS ReportDate, 
   YEAR(p.server_time) AS ServerYear, 
   MONTH(p.server_time) AS ServerMonth, 
   DAY(p.server_time) AS ServerDay, 
   p.mRange AS ServerHourRange, 
   COUNT(p2._total) / NULLIF(COUNT(p1._total) / 100.0, 0.0) AS Ratio
FROM mCTE AS p
LEFT OUTER JOIN mCTE AS p1 ON p.row_id = p1.row_id AND (p._state / 1000) <> 0
LEFT OUTER JOIN mCTE AS p2 ON p.row_id = p2.row_id AND (p._state / 1000) = 1 AND p2.row_id IS NOT NULL
WHERE CONVERT(DATE, p.server_time) = CONVERT(DATE, GETDATE())
GROUP BY YEAR(p.server_time), MONTH(p.server_time), DAY(p.server_time), p.mRange

结果

ReportDate  ServerYear  ServerMonth  ServerDay  ServerHourRange  Ratio
2017-04-28  2017        4            26         18...20          1.754385964912280701
2017-04-28  2017        4            27         12...14          5.479452054794520547
2017-04-28  2017        4            27         15...17          0.000000000000000000

更新2

要仅显示最后3小时的数据，您只需将WHERE子句更改为

WHERE p.server_time >= DATEADD(HOUR, -3, GETDATE())

如何每15分钟选择一次比率

1 个答案: