how to find the duration between two dates

Question

I want to find the duration between the two date columns. For this i used the DATEDIFF function to find number years and months separately but wanted both results in single column. The two columns are given below.

start_dt      |    end_dt
06-Oct-2009      15-Jul-2011  

Result which needed

Duration(years.months)
2.3

Solution 1

I think there is no out-of-the-box API to provide the result in the format you mentioned. You need to use the DATEDIFF function to get the difference in the least denomination you need and then divide the result with appropriate value to get the duration in the format required. Something like this:

DECLARE @start DATETIME
DECLARE @end DATETIME
DECLARE @duration INT

SELECT @start = '2009-10-06', @end = '2011-07-15'
SELECT @duration = DATEDIFF(mm, @start, @end)
SELECT CONVERT(NVARCHAR, @duration / 12) + '.' + CONVERT(NVARCHAR, @duration % 12)

This can be better achieved by writing a function that would take the dates and least denomination and returns the duration in the format needed, as it would require TSQL and plain SQL wouldn't suffice.

Solution 2

try something like this

SELECT
    DATEDIFF( mm, start_dt, end_dt) / 12 AS years
    , DATEDIFF( mm, start_dt, end_dt) % 12 AS months

Solution 3

QUERY :

SELECT 
    CONVERT(VARCHAR, DATEADD(month, 1, GETDATE()), 103) AS FinalDay,
    CONVERT(VARCHAR, HRM_EmpGenDtls.DOJ, 106) AS DOJ,
    CONVERT(varchar, DATEDIFF(year, HRM_EmpGenDtls.DOJ, GETDATE())) + ' Years' + ' ' +                      
    CONVERT(varchar, DATEDIFF(month, HRM_EmpGenDtls.DOJ, GETDATE()) - (datediff(year, HRM_EmpGenDtls.DOJ, GETDATE()) * 12)) + ' Months' + ' ' +      CONVERT(varchar, datepart(d,GETDATE()) - datepart(d, HRM_EmpGenDtls.DOJ)) + ' Days' AS ServicePeriod   
FROM HRM_EmpGenDtls 

That gives following answer :

FinalDay    DOJ ServicePeriod

10/10/2013  03 Sep 2012 1 Years 0 Months 7 Days
10/10/2013  01 Jan 2000 13 Years 8 Months 9 Days
10/10/2013  22 Aug 2000 13 Years 1 Months -12 Days
10/10/2013  22 Aug 2000 13 Years 1 Months -12 Days
10/10/2013  22 Aug 2000 13 Years 1 Months -12 Days
10/10/2013  22 Aug 2000 13 Years 1 Months -12 Days
10/10/2013  22 Aug 2000 13 Years 1 Months -12 Days
10/10/2013  04 Sep 2012 1 Years 0 Months 6 Days

Comments

[Adhikar Patil]

This query will helpful to find difference between two dates in Years, Months and days

[Deenathaiyalan Shanmugam]

Calculate Duration between from and to datetime datatype in Sql server, it will throw only hours, minutes, and seconds.

[Paritosh]

Please edit with more information. Code-only and "try this" answers are discouraged, because they contain no searchable content, and don't explain why someone should "try this".