Date time diff

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Date time diff

boehnc

Ten Centuries

Points: 1001
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October 17, 2020 at 6:05 pm
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#3798389

Hello all,
trying to return the time in minutes between the Date1 and Time1 columns and the Date2 and Time2 columns. Help is much appreciated.
create table #TimeDiff
(Date1 date
,Time1 varchar(50)
,Date2 date
,Time2 varchar(50)
)
Insert into #TimeDiff
values
('2020-08-05', '0500', '2020-08-05', '0600')
,('2020-05-26', '2300', '2020-05-27', '0100')
,('2020-05-28', '1300', '2020-05-29', '1610')
trying to return 60, 120, 190 for minutes
Steve Collins

SSCrazy

Points: 2069
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October 18, 2020 at 6:49 pm
Answer
#3798608
[Edit] I thought there was a typo in line 2 but the date difference seems to also need to include the day date. Therefore, there's a typo in line 3 where the date should be '2020-05-28' for both Date1 as well as Date2. So to add the date and time together the code casts both to datetime and then takes the date difference in minutes. Something like this
```
drop table if exists #TimeDiff;
go
create table #TimeDiff(
  Date1 date
 ,Time1 varchar(50)
 ,Date2 date
 ,Time2 varchar(50));

Insert into #TimeDiff values
('2020-08-05', '0500', '2020-08-05', '0600')
,('2020-05-26', '2300', '2020-05-27', '0100')
,('2020-05-28', '1300', '2020-05-28', '1610');

select datediff(minute, 
                cast(Date1 as datetime)+convert(datetime,stuff(Time1,3,0,':')),
                cast(Date2 as datetime)+convert(datetime,stuff(Time2,3,0,':'))) date_diff
from #TimeDiff;
```
Output (now it matches)
```
date_diff
60
120
190
```
- This reply was modified 3 years, 6 months ago by Steve Collins.
- This reply was modified 3 years, 6 months ago by Steve Collins. Reason: Combined dates and times by converting to datetime
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Cebisa SSC Enthusiast Points: 151 More actions · Answer 1

Sounds like you need to create a datetime column for date1 + time1 , then date2 + time2

After this do a a simple datediff for minute

Michael L John One Orange Chip Points: 27038 More actions · Answer 2

boehnc wrote:

Hello all,
trying to return the time in minutes between the Date1 and Time1 columns and the Date2 and Time2 columns. Help is much appreciated.
create table #TimeDiff
(Date1 date
,Time1 varchar(50)
,Date2 date
,Time2 varchar(50)
)
Insert into #TimeDiff
values
('2020-08-05', '0500', '2020-08-05', '0600')
,('2020-05-26', '2300', '2020-05-27', '0100')
,('2020-05-28', '1300', '2020-05-29', '1610')
trying to return 60, 120, 190 for minutes

Like Cebisa said, why are you not using a datatime2, datetime, or data and time datatypes?

Michael L John
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