Answers for "convert string yyyy-mm-dd to date in sql server"

sql server cast date dd/mm/yyyy

--string to date
  SELECT cast(convert(date, '23/07/2009', 103) AS DATE)
  select convert(date, '23/07/2009', 103)

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/