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Editorial Team
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Asked: 2026-05-23T08:52:58+00:00

I’m writing a query into a table that keeps track of a salesman’s status,

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I’m writing a query into a table that keeps track of a salesman’s status, and keeps track of when they travel. For reference, here are the statuses important to this question:

0: initial value, is working

600: traveling to break

601: on break

603: traveling to lunch

604: at lunch

I’m trying to calculate the total time an employee spends traveling. I am able to return the time to travel and time to lunch using 

SELECT (cast(c1.status_change_dt as date) - cast(c2.status_change_dt as date)) as LunchTravel, C1.CREW_ID
FROM CREW_STATUS c1, CREW_STATUS c2
WHERE c1.status_id = '603' and c2.status_id = '602'
and c1.mobile_token = c2.mobile_token

With the same for the break. Mobile_token is to make sure that it’s being returned on the same day (each employee gets a unique token every day).

Status_change_dt is a timestamp

I do the same thing, but the other status_id’s to get the BreakTravel time.

So I end up with LunchTravel and BreakTravel, but I feel that creating 4 Crew_Status is inefficient, and it actually runs pretty slow.

Is there a better way to do this?

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1 Answer

  1. Editorial Team

    If I understand your question, I think you can use a UNION ALL, or a CASE statement.

    SELECT (cast(c1.status_change_dt as date) - cast(c2.status_change_dt as date))
, CASE WHEN c1.status_id = '603' and c2.status_id = '602' THEN 'Lunch Travel'
,      WHEN c1.status_id = '604' and c2.status_id = '605' THEN 'Break Travel'
END AS travel_type
FROM CREW_STATUS c1, CREW_STATUS c2
WHERE c1.mobile_token = c2.mobile_token

    OR 

    SELECT (cast(c1.status_change_dt as date) - cast(c2.status_change_dt as date)) as Travel, 'Lunch Travel' AS travel_type, C1.CREW_ID
FROM CREW_STATUS c1, CREW_STATUS c2
WHERE c1.status_id = '603' and c2.status_id = '602'
and c1.mobile_token = c2.mobile_token

UNION ALL

SELECT (cast(c1.status_change_dt as date) - cast(c2.status_change_dt as date)) as Travel, 'Break Travel' AS travel_type, C1.CREW_ID
FROM CREW_STATUS c1, CREW_STATUS c2
WHERE c1.status_id = '605' and c2.status_id = '606'
and c1.mobile_token = c2.mobile_token
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