将秒转换为dd：hh：mm：ss（sql：query jsp）

Question

My simple brain is having trouble in determining which changes I need to make to this (which is working)

SELECT Name, Zone, Duration,

FLOOR(Duration/3600) as hours

,ROUND(FLOOR((Duration/3600-FLOOR(Duration/3600))*60)) as mins

,ROUND((((Duration/3600-FLOOR(Duration/3600))*60) - FLOOR((Duration/3600-FLOOR(Duration/3600))*60)) * 60) as secs

from duration 

(Duration is in seconds)

to determining dd:hh:mm:ss (days:hours:minutes:seconds). I know the days calculation needs to divide by 86400 but am not sure what the other calculations should then be.

Assistance appreciated.

Note, after many days of fiddling, this is the closest I can get to something meaningful (without any errors, NULLS etc)

SELECT Name, Zone, Duration,
FLOOR(Duration/60/60/24) as days
,FLOOR(Duration/60/60)%24 as hours
,FLOOR(Duration/60)%60 as mins
,Duration%60 as secs
from duration 

but it would be nice to display everything as 2 characters (dd:mm:hh:mm, not d:hh:m:ss etc) but not by having to use c:set, fmt then c:out etc (which is messy and long in my opinion)

Regards Ralph

Answer 1

Try this:

SELECT Duration DIV 86400, SEC_TO_TIME(Duration MOD 86400)

To get the whole thing in one text string, do this:

SELECT CONCAT_WS(':', Duration DIV 86400, SEC_TO_TIME(Duration MOD 86400))

DIV and MOD are integer operators. CONCAT_WS() concatenates with a specified separator character, : in your case.

If for some reason CONCAT_WS() doesn't work, try

SELECT CONCAT(Duration DIV 86400, ':',SEC_TO_TIME(Duration MOD 86400))

It's possible your Duration value has a datatype other than INT . Try this:

SELECT CONCAT(CAST(Duration AS INT) DIV 86400, 
              ':',
              SEC_TO_TIME(CAST(Duration AS INT)  MOD 86400));