What are the distinct visit dates?
SELECT DISTINCT Visit_Date FROM VISITS
SELECT DISTINCT Visit_Date FROM VISITS
[{'Visit_Date': '2004-08-21 03:06:14'}, {'Visit_Date': '2013-08-06 05:35:51'}, {'Visit_Date': '2013-10-27 09:56:08'}, {'Visit_Date': '1990-08-15 14:24:10'}, {'Visit_Date': '1980-11-26 02:08:00'}, {'Visit_Date': '2017-03-19 08:48:19'}, {'Visit_Date': '2008-11-09 01:28:01'}, {'Visit_Date': '1989-08-24 20:26:37'}, {'Visit_Date': '1993-02-01 15:27:20'}, {'Visit_Date': '2007-09-17 10:12:45'}, {'Visit_Date': '1998-05-12 00:50:20'}, {'Visit_Date': '2010-10-04 01:34:12'}, {'Visit_Date': '2018-01-09 20:39:52'}, {'Visit_Date': '1971-12-16 06:41:26'}, {'Visit_Date': '1998-12-10 02:46:43'}, {'Visit_Date': '1996-01-08 13:23:41'}, {'Visit_Date': '2007-09-03 04:30:01'}, {'Visit_Date': '1974-12-31 23:18:24'}, {'Visit_Date': '2001-11-13 10:08:28'}, {'Visit_Date': '1990-11-12 00:54:50'}]