Question

Using SQL Sever 2005

Table1

ID StartDate EndDate

001 02/23/2010 07/22/2010
002 05/03/2010 null
003 02/02/2011 null
...

Table2

Date

02/24/2011
02/25/2011
...
...

Condition

• If the enddate is not null then startDate compare with max(date) from table2, if the startdate > 6 month then it should display as “Expired”

How to make a query for the above condition.

Need query Help.

Answer 1

Select 
  StartDate,
  [Status]=Case  
        when DATEDIFF(m,StartDate,(Select MAX(Date) from Table2))>6
        then 'Expired' 
        Else 'Valid'
        end

  From Table1
  where EndDate is not null