sql code for yyyy-mm-dd sql server code example
Example: sql server date format yyyy-mm-dd
convert(varchar, [column_date], 20) --(date or datetime) to yyyy-MM-dd HH:mm:ss
convert(varchar, [column_date], 23) --(date or datetime) to yyyy-MM-dd
--ref https://www.mssqltips.com/sqlservertip/1145/date-and-time-conversions-using-sql-server/