convert 0.3(real datatype) into 00:30(time) in sql server 2005

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Hello,

I have field in db table which have real datatype in SQL 2005. I want to convert it into time (HH:MM) format and add to another time.

ex:
0.3 (convert it to 00:30) and want to add into 17:45 so i can get 18:15
0.45(convert it to 00:45) and want to add into 17:45 so i can get 18:30
1(convert it to 01:00) and want to add into 17:45 so i can get 18:45

Thanks.

Posted 28-Jul-14 22:06pm

kk2014

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Maciej Los 29-Jul-14 4:21am

0.3 is not equal to half an hour (30 minutes)! 60*0.3= 18 minutes. But NOT 30 minutes!

kk2014 29-Jul-14 4:54am

yes you are right. first need to convert 0.3 into 00:30 min.

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Maciej Los · Answer 1 · 2014-07-28T22:28:00

Solution 1

Please, read my comment to the question.

SQL

DECLARE @rtime REAL 

SET @rtime = 0.3

SELECT @rtime AS rTime , @rtime *60 AS RealTime, DATEADD(MINUTE  , @rtime *60, '2014-07-29 17:45:00') AS NewTime

For further information, please see: DATEADD[^]

Posted 28-Jul-14 22:28pm

Maciej Los

Comments

kk2014 29-Jul-14 4:54am

first need to convert 0.3 into 00:30 min which means half n hour.
your solution will give answer 2014-07-29 18:03:00.000.
it should get 2014-07-29 18:15:00.000.

Maciej Los 29-Jul-14 5:34am

No, it shouldn't. If 1 is equal to 1 hr, then 0.3 is equal to 18 mins. In case when 0.6 will be equal to 1 hr, i would agree with you.

kk2014 29-Jul-14 5:44am

hello,
please read post carefully. 0.3 is real and need to convert into time(HH:MM).

Maciej Los 29-Jul-14 5:47am

I read it carefully. I'm trying to tell you that the 0.3 can't be equal to 0.5 hour. Logic!!!