datediff

问题 This question already has an answer here: How do I calculate someone's age in C#? 61 answers How can I calculate date difference between two dates in years? For example: (Datetime.Now.Today() - 11/03/2007) in years. 回答1: I have written an implementation that properly works with dates exactly one year apart. However, it does not gracefully handle negative timespans, unlike the other algorithm. It also doesn't use its own date arithmetic, instead relying upon the standard library for that. So

问题 I have two columns: job_start job_end 2011-11-02 12:20:37.247 2011-11-02 13:35:14.613 How would it be possible using T-SQL to find the raw amount of time that has passed between when the job started and when the job ended? I tried this: select (job_end - job_start) from tableA but ended up with this: 1900-01-01 01:14:37.367 回答1: Take a look at the DateDiff() function. -- Syntax -- DATEDIFF ( datepart , startdate , enddate ) -- Example usage SELECT DATEDIFF(DAY, GETDATE(), GETDATE() + 1) AS

问题 I\'m looking to calculate the number of months between 2 date time fields. Is there a better way than getting the unix timestamp and the dividing by 2 592 000 (seconds) and rounding up whithin MySQL? 回答1: The DATEDIFF function can give you the number of days between two dates. Which is more accurate, since... how do you define a month? (28, 29, 30, or 31 days?) 回答2: Month-difference between any given two dates: I'm surprised this hasn't been mentioned yet: Have a look at the TIMESTAMPDIFF()

问题 There has to be an easier way to do this. I have objects that want to be refreshed every so often, so I want to record when they were created, check against the current timestamp, and refresh as necessary. datetime.datetime has proven to be difficult, and I don\'t want to dive into the ctime library. Is there anything easier for this sort of thing? 回答1: if you want to compute differences between two known dates, use total_seconds like this: import datetime as dt a = dt.datetime(2013,12,30,23

问题 This question already has an answer here: How to calculate the difference between two dates using PHP? 32 answers Is there a quick way to calculate date difference in php? For example: $date1 = \'2009-11-12 12:09:08\'; $date2 = \'2009-12-01 08:20:11\'; And then do a calculation, $date2 minus $date1 I read php.net documentation, but no luck. Is there a quick way to do it? 回答1: strtotime will convert your date string to a unix time stamp. (seconds since the unix epoch. $ts1 = strtotime($date1);

问题 In Ruby on Rails, there is a feature that allows you to take any Date and print out how \"long ago\" it was. For example: 8 minutes ago 8 hours ago 8 days ago 8 months ago 8 years ago Is there an easy way to do this in Java? 回答1: Take a look at the PrettyTime library. It's quite simple to use: import org.ocpsoft.prettytime.PrettyTime; PrettyTime p = new PrettyTime(); System.out.println(p.format(new Date())); // prints "moments ago" You can also pass in a locale for internationalized messages:

问题 I\'ve been searching for 4 hours now, and have not found a solution to get the difference between two dates in years, months, and days in JavaScript, like: 10th of April 2010 was 3 years, x month and y days ago. There are lots of solutions, but they only offer the difference in the format of either days OR months OR years, or they are not correct (meaning not taking care of actual number of days in a month or leap years, etc). Is it really that difficult to do that? I\'ve had a look at: http:

问题 How to find the difference between two dates? 回答1: By using the Date object and its milliseconds value, differences can be calculated: var a = new Date(); // Current date now. var b = new Date(2010, 0, 1, 0, 0, 0, 0); // Start of 2010. var d = (b-a); // Difference in milliseconds. You can get the number of seconds (as a integer/whole number) by dividing the milliseconds by 1000 to convert it to seconds then converting the result to an integer (this removes the fractional part representing the

问题 I need to find the number of days between two dates : one is from a report and one is the current date. My snippet: int age=calculateDifference(agingDate, today); Here calculateDifference is a private method, agingDate and today are Date objects, just for your clarification. I\'ve followed two articles from a Java forum, Thread 1 / Thread 2. It works fine in a standalone program although when I include this into my logic to read from the report I get an unusual difference in values. Why is it

问题 How would I work out the difference for two Date() objects in JavaScript, while only return the number of months in the difference? Any help would be great :) 回答1: The definition of "the number of months in the difference" is subject to a lot of interpretation. :-) You can get the year, month, and day of month from a JavaScript date object. Depending on what information you're looking for, you can use those to figure out how many months are between two points in time. For instance, off-the