id Name ... start_date end_date
0 2108 Ahsen Javed Khan ... 2018-02-17 2018-02-18
1 2108 Ahsen Javed Khan ... 2018-01-23 2018-01-24
2 2108 Ahsen Javed Khan ... 2012-11-15 2012-12-31
3 2108 Ahsen Javed Khan ... 2015-05-01 2015-10-31
4 2108 Ahsen Javed Khan ... 2017-10-01 2017-12-31
such that i have 500K records, now i want the details of all id and i don't want to remove duplication of id's.
I want to have output like below.
id Name ... start_date end_date
0 2108 Ahsen Javed Khan ... 2018-02-17 2018-02-18
1 ... 2018-01-23 2018-01-24
2 ... 2012-11-15 2012-12-31
3 ... 2015-05-01 2015-10-31
4 ... 2017-10-01 2017-12-31