Question

I’m working in Teradata and am trying to calulate the average time a job completes.

Data Values:

Job Name            Start Date  End Date    End Time
D_BDW_CCIP_SRM_LD   10/10/2012  10/11/2012  01:41:49
D_BDW_CCIP_SRM_LD   10/9/2012   10/10/2012  00:19:56
D_BDW_CCIP_SRM_LD   10/8/2012   10/8/2012   23:37:18
D_BDW_CCIP_SRM_LD   10/5/2012   10/5/2012   23:39:47
D_BDW_CCIP_SRM_LD   10/4/2012   10/4/2012   23:42:47
D_BDW_CCIP_SRM_LD   10/3/2012   10/3/2012   23:41:54

The average is coming back with 16:07 instead of 00:07. What I need to happen is that the calculations where the job finishes next day understands that the time expanded.

In Excel I could do this by adding one day to the end time and then averaging and displaying as a time.

How do I do this in Teradata?

Answer 1

This seems to do the trick, but I’d be interested in seeing if there is another way.

SELECT job_name,
    case when avg_end_time_in_minutes  > 60*24 then avg_end_time_in_minutes - 60*24 
         else avg_end_time_in_minutes end as avg_adjusted,
case when max_end_time_in_minutes  > 60*24 then max_end_time_in_minutes - 60*24 
     else max_end_time_in_minutes end as max_adjusted,
CAST((CAST(avg_adjusted / 60  AS INTEGER) (FORMAT '9(2)')) AS CHAR(2))||':'||
CAST((CAST((avg_adjusted / 60 MOD 1)*60  AS INTEGER) (FORMAT '9(2)')) AS CHAR(2)) 
                        avg_adjusted_time,
CAST((CAST(max_adjusted / 60  AS INTEGER) (FORMAT '9(2)')) AS CHAR(2))||':'||
CAST((CAST((max_adjusted / 60 MOD 1)*60  AS INTEGER) (FORMAT '9(2)')) AS CHAR(2)) 
                           max_adjusted_time
FROM (
SELECT job_name,
    AVG(end_time_in_minutes) avg_end_time_in_minutes,
    MAX(CAST(end_time_in_minutes AS DECIMAL(8,2))) max_end_time_in_minutes
FROM (
SELECT job_name,
    CAST(substr(end_time, 1, 2) AS INTEGER)*60
        + CAST(substr(end_time, 4, 2) AS INTEGER) 
        + cast(end_date - start_date as integer)*60*24 AS end_time_in_minutes
FROM dabank_prod_ops_tb.bdw_tables_load_tracker_view a          
WHERE a.status = 'COMPLETED' 
AND a.start_date BETWEEN CURRENT_DATE - 31 AND CURRENT_DATE -1
AND a.end_time IS NOT NULL
) a
GROUP BY 1
) b