Comparing two dates+times [bash]

To compare two dates+times* in bash I have always used date +%s and compared the resulting strings. Is there a better way to do it? Thanks.
* As in "is date+time Y after date+time X?"

Years ago I wrote a bash script to build a thumbnail gallery webpage for a local directory structure of torrents. For each torrent, it created the thumbnail of an image with the same name, scraped torrents to get seeders/leechers, parsed a text file of urls and added links below the image with special favicons for commonly linked sites.
That was a hassle, and I have been afraid to look at the script since I stopped using it. But the page it produced was pretty sweet.
Most of the scripts I write are a bit more down-to-earth than that though.
Last edited by alphaniner (2012-04-25 18:50:02)

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Comparing two date/times

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Try this:
import java.util.*;
public class timeDif {
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}V.V.

Comparing two dates and adding days to date

Hi,
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Please reply soon.Thanks

No,all other queries are different,as they have the
date in this format
'2006-03-06 " but i have the date in this format
"2006-03-06 10:26:46.0",
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date format 2000/12/1),then I can easily do it,but
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can split the date into three strings,and after
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Compare two dates in a report

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Hi !
It depends on the interval you need to compare these dates. If you want to know the number of days between these dates, you'll have to use SQL_TSI_DAY as interval. If it's minutes, you'll need SQL_TSI_MINUTE...
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Hi
I want to compare two dates....one of which is in the timeStamp format ("yyyy-MM-dd HH:mm:ss")
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HTH
Mike

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import java.util.*;
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Has anyone used the Calendar.before() method for comparing two dates, how accurate is this?
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manjit84 wrote:
Has anyone used the Calendar.before() method for comparing two dates, Yes.
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The datediff function resulted in an overflow. The number of dateparts separating two date/time instances is too large. Try to use datediff with a less precise datepart.

The below function is giving me the hours difference what I wanted, but today it is giving us the below error:
Msg 535, Level 16, State 0, Line 1
The datediff function resulted in an overflow. The number of dateparts separating two date/time instances is too large. Try to use datediff with a less precise datepart.
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ALTER FUNCTION [dbo].[GetHoursExcludingWeekdays](@StartDate datetime2,@EndDate datetime2)
returns decimal(12,3)
as
begin
if datepart(weekday,@StartDate) = 1
set @StartDate = dateadd(day,datediff(day,0,@StartDate),1)
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if datepart(weekday,@EndDate) = 7
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declare @return decimal(12,3)
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ReportingServices

You'll get this error if the difference between the start and end date is greater that about 68 years due to the "second" DATEDIFF specification. Perhaps the dates are greater than the expected range due to a data quality issue.
Taking the advice from the error message, you could use minutes instead of seconds like the example below the version below. This could still result in the error of the difference is greater than a couple of hundred years, though. You might consider
validating the dates and returning NULL if outside expected limits.
ALTER FUNCTION [dbo].[GetHoursExcludingWeekdays](@StartDate datetime2,@EndDate datetime2)
returns decimal(12,3)
as
begin
if datepart(weekday,@StartDate) = 1
set @StartDate = dateadd(day,datediff(day,0,@StartDate),1)
if datepart(weekday,@StartDate) = 7
set @StartDate = dateadd(day,datediff(day,0,@StartDate),2)
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-- to count all of Friday's hours
if datepart(weekday,@EndDate) = 1
set @EndDate = dateadd(day,datediff(day,0,@EndDate),-2)
if datepart(weekday,@EndDate) = 7
set @EndDate = dateadd(day,datediff(day,0,@EndDate),-1)
declare @return decimal(12,3)
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Dan Guzman, SQL Server MVP, http://www.dbdelta.com

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This is not a JavaScript forum.
[*Google* JavaScript Forum|http://www.google.co.uk/search?q=JavaScript+Forum&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a]
Good luck.

How to compare two dates to know which one is greater than oher?

how to compare two dates to know which one is greater than oher?
Please search before asking basic questions.
Edited by: Rob Burbank on Mar 27, 2009 9:26 AM

Hi,
If thse to date fields are of same type u can directly compare like this.
regards,
Bharat.

Compare two dates with NULL in one

I am trying to do the following with a simple SQL. Compare two dates and get the latest one, but the greatest() function always returns NULL if NULL is present. So how can I do it ?
Date1 Date2 Desired Result
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01-May-09 NULL 01-May-09
01-May-09 01-Nov-09 01-Nov-09
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Any suggestion ? Thanks

Hi,
Try this,
create table test1
fdate date,
tdate date
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Thanks&Regards,
Jai

Comparing two dates in a report

Hello,
I am attempting to compare two dates in a report in order to format a column. My code for that portion of the report is as follows:
CASE
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END AS DATE_DUE,I'm getting the error message ORA-00932: inconsistent datatypes: expected CHAR got DATE.
I've been trying to fix the condition to get rid of the error with no success.
Thanks
-Brian

One thing I just noticed that may or may not be the problem is that your case statement is returning two different datatypes depending on the condition. In one part, it is returning a character string of the span tags concatenated with the due_date (which in and of itself are incompatible datatypes) and the second part is returning just a date.
Again, not sure if the SQL engine will do automatic conversions for you, but this seems to jive with your "char vs. date" error.

Calculate difference between two dates/times

Hi all,
Is there any function module to calculate difference between two dates/times which are in TIMESTAMPL format.
I need to know how many millisconde(second,minutes, hours... )there is between these two times.
Please, It is urgent
Thank you all.
Karim

hi,
try the following function
CALL FUNCTION 'CCU_TIMESTAMP_DIFFERENCE'
      EXPORTING
           timestamp1 = timestamp1
           timestamp2 = timestamp2
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      EXCEPTIONS
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the above function gives the difference in seconds...
try the following code to set the resolution to milliseconds..
SET RUN TIME CLOCK RESOLUTION LOW
check the thread for details:
SET RUN TIME CLOCK RESOLUTION?
all the best!!!
Regards,
Aparna

Comparing two dates+times [bash]

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