Cross tab: Getting the count based on three consecutive dates

Hi All,

I have a crosstab which as Ticket_no and Date columns. here is the sample  report data.

        Ticket_no          Date

              1                1-Jan-2013

              1                2-Jan-2013

              1                3-Jan-2013

              2                1-Jan-2013

              1                1-Jan-2013

count of tickets which are raised for consecutive 3 days in a month. Here ticket_No 1 is raised for the first 3 days..so count will be 1. 

Can any one help me in this case.

Thanks in advance.

Regards,

Krishna