I have different date variables and want to find the second minimum date. That is when you order the dates from lowest to highest, what is the second lowest date after the first? Can someone help me with this, please? Below is an example dataset. Thank you very much.
ID age date1 date2 date3 date4
1. 30. 16/12/2012 10/06/2000 01/01/1999 06/05/2001
​​​​​​2. 19. 16/07/2014 09/04/2002 02/10/1999 07/04/1998