SUBTIME returning incorrect value on time difference










0















I have two times, start time and end time, end time is always greater than start which is my case is:



SUBTIME('22:00', '06:00')



This returns 16:00 because its considering it as same date but 06:00 is greater so the difference should come out as 08:00 hours. I tried swapping but it gives -16 instead.



Is there a way to get the correct value without adding date to time values?



Ended up doing this



SELECT * FROM Table
WHERE check_in BETWEEN CONCAT(schedule_date,' ',start_time) AND (CASE WHEN(SUBTIME(end_time, start_time) < 0) THEN CONCAT(schedule_date + INTERVAL 1 DAY,' ',end_time) ELSE CONCAT(schedule_date,' ',end_time) END)





mysql







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  • You can add a CASE statement - adding 24 hours to end times that are 'less' than start times.

    – Strawberry
    Nov 12 '18 at 8:03












  • Thanks looks interesting let me try

    – SW Dev
    Nov 12 '18 at 8:14











  • So 22:00 is the start time?

    – Salman A
    Nov 12 '18 at 9:28















0















I have two times, start time and end time, end time is always greater than start which is my case is:



SUBTIME('22:00', '06:00')



This returns 16:00 because its considering it as same date but 06:00 is greater so the difference should come out as 08:00 hours. I tried swapping but it gives -16 instead.



Is there a way to get the correct value without adding date to time values?



Ended up doing this



SELECT * FROM Table
WHERE check_in BETWEEN CONCAT(schedule_date,' ',start_time) AND (CASE WHEN(SUBTIME(end_time, start_time) < 0) THEN CONCAT(schedule_date + INTERVAL 1 DAY,' ',end_time) ELSE CONCAT(schedule_date,' ',end_time) END)





mysql







share|improve this question
























  • You can add a CASE statement - adding 24 hours to end times that are 'less' than start times.

    – Strawberry
    Nov 12 '18 at 8:03












  • Thanks looks interesting let me try

    – SW Dev
    Nov 12 '18 at 8:14











  • So 22:00 is the start time?

    – Salman A
    Nov 12 '18 at 9:28













0












0








0








I have two times, start time and end time, end time is always greater than start which is my case is:



SUBTIME('22:00', '06:00')



This returns 16:00 because its considering it as same date but 06:00 is greater so the difference should come out as 08:00 hours. I tried swapping but it gives -16 instead.



Is there a way to get the correct value without adding date to time values?



Ended up doing this



SELECT * FROM Table
WHERE check_in BETWEEN CONCAT(schedule_date,' ',start_time) AND (CASE WHEN(SUBTIME(end_time, start_time) < 0) THEN CONCAT(schedule_date + INTERVAL 1 DAY,' ',end_time) ELSE CONCAT(schedule_date,' ',end_time) END)





mysql







share|improve this question
















I have two times, start time and end time, end time is always greater than start which is my case is:



SUBTIME('22:00', '06:00')



This returns 16:00 because its considering it as same date but 06:00 is greater so the difference should come out as 08:00 hours. I tried swapping but it gives -16 instead.



Is there a way to get the correct value without adding date to time values?



Ended up doing this



SELECT * FROM Table
WHERE check_in BETWEEN CONCAT(schedule_date,' ',start_time) AND (CASE WHEN(SUBTIME(end_time, start_time) < 0) THEN CONCAT(schedule_date + INTERVAL 1 DAY,' ',end_time) ELSE CONCAT(schedule_date,' ',end_time) END)





mysql




mysql






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 12 '18 at 10:11







SW Dev

















asked Nov 12 '18 at 7:59









SW DevSW Dev

11




11












  • You can add a CASE statement - adding 24 hours to end times that are 'less' than start times.

    – Strawberry
    Nov 12 '18 at 8:03












  • Thanks looks interesting let me try

    – SW Dev
    Nov 12 '18 at 8:14











  • So 22:00 is the start time?

    – Salman A
    Nov 12 '18 at 9:28

















  • You can add a CASE statement - adding 24 hours to end times that are 'less' than start times.

    – Strawberry
    Nov 12 '18 at 8:03












  • Thanks looks interesting let me try

    – SW Dev
    Nov 12 '18 at 8:14











  • So 22:00 is the start time?

    – Salman A
    Nov 12 '18 at 9:28
















You can add a CASE statement - adding 24 hours to end times that are 'less' than start times.

– Strawberry
Nov 12 '18 at 8:03






You can add a CASE statement - adding 24 hours to end times that are 'less' than start times.

– Strawberry
Nov 12 '18 at 8:03














Thanks looks interesting let me try

– SW Dev
Nov 12 '18 at 8:14





Thanks looks interesting let me try

– SW Dev
Nov 12 '18 at 8:14













So 22:00 is the start time?

– Salman A
Nov 12 '18 at 9:28





So 22:00 is the start time?

– Salman A
Nov 12 '18 at 9:28












1 Answer
1






active

oldest

votes


















0














Then don't use simple times, but dates.



SELECT TIMESTAMPDIFF(HOUR, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00'));


This returns 8, when you want to have it as 08:00, try this:



SELECT SEC_TO_TIME(TIMESTAMPDIFF(SECOND, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00')));





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  • Thanks if i couldn't find an answer i ll go this way

    – SW Dev
    Nov 12 '18 at 8:15










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1 Answer
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active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









0














Then don't use simple times, but dates.



SELECT TIMESTAMPDIFF(HOUR, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00'));


This returns 8, when you want to have it as 08:00, try this:



SELECT SEC_TO_TIME(TIMESTAMPDIFF(SECOND, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00')));





share|improve this answer























  • Thanks if i couldn't find an answer i ll go this way

    – SW Dev
    Nov 12 '18 at 8:15















0














Then don't use simple times, but dates.



SELECT TIMESTAMPDIFF(HOUR, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00'));


This returns 8, when you want to have it as 08:00, try this:



SELECT SEC_TO_TIME(TIMESTAMPDIFF(SECOND, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00')));





share|improve this answer























  • Thanks if i couldn't find an answer i ll go this way

    – SW Dev
    Nov 12 '18 at 8:15













0












0








0







Then don't use simple times, but dates.



SELECT TIMESTAMPDIFF(HOUR, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00'));


This returns 8, when you want to have it as 08:00, try this:



SELECT SEC_TO_TIME(TIMESTAMPDIFF(SECOND, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00')));





share|improve this answer













Then don't use simple times, but dates.



SELECT TIMESTAMPDIFF(HOUR, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00'));


This returns 8, when you want to have it as 08:00, try this:



SELECT SEC_TO_TIME(TIMESTAMPDIFF(SECOND, CONCAT('1970-01-01 ', '22:00'), CONCAT('1970-01-02 ', '06:00')));






share|improve this answer












share|improve this answer



share|improve this answer










answered Nov 12 '18 at 8:08









fancyPantsfancyPants

39.5k166883




39.5k166883












  • Thanks if i couldn't find an answer i ll go this way

    – SW Dev
    Nov 12 '18 at 8:15

















  • Thanks if i couldn't find an answer i ll go this way

    – SW Dev
    Nov 12 '18 at 8:15
















Thanks if i couldn't find an answer i ll go this way

– SW Dev
Nov 12 '18 at 8:15





Thanks if i couldn't find an answer i ll go this way

– SW Dev
Nov 12 '18 at 8:15



















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