I have a problem in selecting rows that have the same value. My data is too huge to go row by row to do that. I want you guys to let me know scripts that can perform this. My data looks like as below:file name: tempStart day   hour    end day        hour Value01/04/2000  22:00   01/05/2000  09:00   -901/05/2000  09:00   01/06/2000  09:00   -901/06/2000  09:00   01/07/2000  09:00   -901/07/2000  09:00   01/08/2000  09:00   -901/08/2000  09:00   01/09/2000  09:00   -901/09/2000  09:00   01/10/2000  09:00   -901/10/2000  09:00   01/11/2000  09:00   -901/11/2000  09:00   01/11/2000  21:30   -901/11/2000  22:30   01/12/2000  09:00   -901/12/2000  09:00   01/13/2000  09:00   -901/15/2000  09:00   01/16/2000  09:00   -901/16/2000  09:00   01/17/2000  09:00   -901/17/2000  09:00   01/18/2000  09:00   -901/18/2000  09:00   01/18/2000  22:45   -901/18/2000  22:50   01/19/2000  09:00   0.1501/19/2000  09:00   01/20/2000  09:00   -901/20/2000  09:00   01/21/2000  09:00   -901/21/2000  09:00   01/22/2000  09:00   -901/22/2000  09:00   01/23/2000  09:00   -901/23/2000  09:00   01/24/2000  09:00   -901/24/2000  09:00   01/25/2000  09:00   -901/25/2000  09:00   01/26/2000  00:35   -901/26/2000  00:35   01/26/2000  09:00   -901/26/2000  09:00   01/27/2000  09:00   -9Above 01/18/2000 for instance appears twice as the Start day, and twice as the end day. Therefore, I want to include the lines that have 01/18/2000 as the Start day or end day.I want my output from the above data be:Start day   hour    end day        hour Value01/10/2000  09:00   01/11/2000  09:00   -901/11/2000  09:00   01/11/2000  21:30   -901/11/2000  22:30   01/12/2000  09:00   -901/17/2000  09:00   01/18/2000  09:00   -901/18/2000  09:00   01/18/2000  22:45   -901/18/2000  22:50   01/19/2000  09:00   0.1501/25/2000  09:00   01/26/2000  00:35   -901/26/2000  00:35   01/26/2000  09:00   -901/26/2000  09:00   01/27/2000  09:00   -9
selecting rows that have the same value
text processing;scripting;sort