ORDERBY内でSUBSTRとCASTASUNSIGNED / SIGNEDを使用できます:
SELECT * FROM table_name ORDER BY
SUBSTR(col_name FROM 1 FOR 1),
CAST(SUBSTR(col_name FROM 2) AS UNSIGNED)
ORDERBY内でSUBSTRとCASTASUNSIGNED / SIGNEDを使用できます:
SELECT * FROM table_name ORDER BY
SUBSTR(col_name FROM 1 FOR 1),
CAST(SUBSTR(col_name FROM 2) AS UNSIGNED)