What is the highest value for col(m) at North Island?
CREATE TABLE table_18946749_4 (col__m_ INTEGER, island VARCHAR)
SELECT MAX(col__m_) FROM table_18946749_4 WHERE island = "North island"
### Context: CREATE TABLE table_18946749_4 (col__m_ INTEGER, island VARCHAR) ### Question: What is the highest value for col(m) at North Island? ### Answer: SELECT MAX(col__m_) FROM table_18946749_4 WHERE island = "North island"