how to get format date yyyy-mm-dd in sql code example

Example 1: SQL query to convert DD/MM/YYYY to YYYY-MM-DD

SELECT CONVERT(varchar(10), CONVERT(date, '13/12/2016', 103), 120)

Example 2: sql convert date to string yyyy-mm-dd

select CONVERT(char(10), GetDate(),126)
/* 2020-12-23 */