WHAT IS THE LOWEST DATE FOR KOREA, IN CD FORMAT?
CREATE TABLE table_name_23 (date INTEGER, region VARCHAR, format VARCHAR)
SELECT MIN(date) FROM table_name_23 WHERE region = "korea" AND format = "cd"
### Context: CREATE TABLE table_name_23 (date INTEGER, region VARCHAR, format VARCHAR) ### Question: WHAT IS THE LOWEST DATE FOR KOREA, IN CD FORMAT? ### Answer: SELECT MIN(date) FROM table_name_23 WHERE region = "korea" AND format = "cd"