문자열 함수

DECLARE @s VARCHAR(10)
SET @s = '한글123
'

SELECT @s + '@', len(@s), datalength(@s)
SELECT ascii(@s), ascii(reverse(@s))
SELECT ascii(substring(@s, len(@s),  len(@s) + 1))

SELECT len('가나다'), datalength('가나다') --3	6

=-=> oracle?