Get Hour and minute in SQL

SELECT
CASE
WHEN DATEDIFF(MINUTE,'2020-12-18 10:52:12',GETDATE())/60>0
THEN DATEDIFF(MINUTE,'2020-12-18 10:52:12',GETDATE())/60
ELSE ''
END Hr,
DATEDIFF(MINUTE,'2020-12-18 10:52:12',GETDATE())%60 min ;

Output