获取时间间隔计数

Question

我有一个名为Call_Data的表，数据如下：

Arr_Date      Interval    AN_Time    AB_Time
08/08/2011    1600        113        NULL
08/08/2011    1400        317        NULL
08/09/2011    1200        298        NULL
08/09/2011    1000        NULL       194
08/10/2011    1200        256        NULL
08/10/2011    1400        NULL       132

我希望得到如下输出：

Arr_Date    Total_calls  AN_10_min   AN_5_min   AB_10_Min     AB_5_min
08/08/2011   2             2            1             0           0
08/09/2011   2             1            1             1           1
08/10/2011   2             1            1             1           1

逻辑是列AN_Time，AB_Time是以秒为单位。我想计算每列每天在10分钟和5分钟范围内的呼叫数。

我写了这样的东西：

SELECT  ARR_date,
CASE WHEN AN_TIME <300 THEN 1 ELSE 0 END AS AN_5_min ,
case WHEN AN_TIME <600 THEN 1 ELSE 0 END AS AN_10_min,
CASE WHEN AB_TIME <300 THEN 1 ELSE 0 END AS AB_5_min ,
case WHEN AB_TIME <600 THEN 1 ELSE 0 END AS AB_10_min
FROM Call_Data
GROUP BY AR_Date,AN_TIME,AB_TIME

但这并不能告诉我调用的总数。有谁可以帮我？

Answer 1

你很接近了：

SELECT  
  ARR_date,
  COUNT(*)  AS Total_calls,
  SUM( CASE WHEN AN_TIME <300 THEN 1 ELSE 0 END )  AS AN_5_min ,
  SUM( CASE WHEN AN_TIME <600 THEN 1 ELSE 0 END )  AS AN_10_min,
  SUM( CASE WHEN AB_TIME <300 THEN 1 ELSE 0 END )  AS AB_5_min ,
  SUM( CASE WHEN AB_TIME <600 THEN 1 ELSE 0 END )  AS AB_10_min
FROM Call_Data
GROUP BY AR_Date

您还可以使用NULL和COUNT来(向任何未来的程序员)显示您实际上是在计算调用次数，而不是求和：

SELECT  
  ARR_date,
  COUNT(*)  AS Total_calls,
  COUNT( CASE WHEN AN_TIME <300 THEN 1 ELSE NULL END )  AS AN_5_min ,
  COUNT( CASE WHEN AN_TIME <600 THEN 1 ELSE NULL END )  AS AN_10_min,
  COUNT( CASE WHEN AB_TIME <300 THEN 1 ELSE NULL END )  AS AB_5_min ,
  COUNT( CASE WHEN AB_TIME <600 THEN 1 ELSE NULL END )  AS AB_10_min
FROM Call_Data
GROUP BY AR_Date

Answer 2

你就快到了，只要把这些列加起来就行了。

SELECT
    ARR_date,
    SUM(AN_5_min) AN_5_min,
    SUM(AN_10_min) AN_10_min,
    SUM(AB_5_min) AB_5_min,
    SUM(AB_10_min) AB_10_min
FROM
    (SELECT 
        ARR_date,
        CASE WHEN AN_TIME <300 THEN 1 ELSE 0 END AS AN_5_min,
        case WHEN AN_TIME <600 THEN 1 ELSE 0 END AS AN_10_min,
        CASE WHEN AB_TIME <300 THEN 1 ELSE 0 END AS AB_5_min,
        case WHEN AB_TIME <600 THEN 1 ELSE 0 END AS AB_10_min
    FROM
        Call_Data) TBL
GROUP BY
    ARR_date

Answer 3

SELECT Arr_Date, COUNT(*) AS Total_Calls,
  SUM(CASE WHEN AN_TIME <300 THEN 1 ELSE 0 END) AS AN_5_min ,
  SUM(case WHEN AN_TIME <600 THEN 1 ELSE 0 END) AS AN_10_min,
  SUM(CASE WHEN AB_TIME <300 THEN 1 ELSE 0 END) AS AB_5_min ,
  SUM(case WHEN AB_TIME <600 THEN 1 ELSE 0 END) AS AB_10_min
FROM dbo.Call_Data
GROUP BY Arr_Date
ORDER BY Arr_Date;