Calculating difference between datetime

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SQL-Server-2008

Hi
I am having a problem as i am trying to calculate the defference between 2
max(startdate) and min(enddate) using a stored procedure in sqlserver 2008. my datatype for startdate and enddate is varchar(50)

SQL

SELECT  
 convert(datetime,min(startDate)) - convert(datetime,max(endDate))
from projects

How can i perform this calculation

Posted 30-May-12 0:55am

kolisa

Updated 30-May-12 1:00am

Rahul Rajat Singh

v3

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2 solutions

Solution 3

To get absolute (positive) value, use ABS[^] function:

SQL

SELECT ABS(DATEDIFF(DAY, MIN([startdate]),MAX([enddate])) AS NumberOfDays from tablename

Posted 30-May-12 2:00am

Maciej Los

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uspatel · Accepted Answer · 2012-05-30T01:04:00

Solution 2

Use DateDiff

SQL

SELECT DATEDIFF(DAY, Convert(datetime,MIN([date])),CONVERT(datetime,MAX([date]))) AS NumberOfDays from tablename

Posted 30-May-12 1:04am

uspatel

Comments

kolisa 30-May-12 7:19am

My startdate and enddate are 2 columns name from project table and i want to get difference(subtract startdate from endate like this startdate-enddate)then get the difference

uspatel 30-May-12 7:27am

use as
SELECT DATEDIFF(DAY, Convert(datetime,MIN([startdate])),CONVERT(datetime,MAX([enddate]))) AS NumberOfDays from tablename

kolisa 30-May-12 7:52am

Thanks alot

Maciej Los 30-May-12 7:57am

Good answer, my 5!