DECLARE @dt DATETIME = '2019-12-31 14:43:35.863';
SELECT
CONVERT(VARCHAR(20),@dt,0) s1,
CONVERT(VARCHAR(20),@dt,100) s2;
=========================================
OUTPUT
=========================================
s1 s2
-------------------- --------------------
Dec 31 2019 2:43PM Dec 31 2019 2:43PM
(1 row affected)