Question

I have a table called Call_Data and the data looks like:

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

I am looking to get output like:

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

The logic is the column AN_Time,AB_Time is in seconds. I want to count the number of calls per day that are within 10min and 5 min range for each column.

I wrote something like this:

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

But this doesn’t gice me the total numbe of calls. Can anyone help me?

Answer 1

You were close:

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

You can also use NULL and COUNT to show (to any future coder) that you are actually counting calls and not summing up:

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