SELECT ROUND(ABS(MAX(LAT_N)-MIN(LAT_N)),4) + ROUND(ABS(MAX(LONG_W)-MIN(LONG_W)),4) FROM STATION;

Manhattn Distance formula is (c-a) + (d-b)

MYSQL: select abs(round((min(lat_n)-max(lat_n)) + (min(long_w)-max(long_w)),4)) from station;

MySQL Answer : SELECT ROUND(ABS(MIN(LAT_N) - MAX(LAT_N)) + ABS(MIN(LONG_W) - MAX(LONG_W)),4) FROM STATION

SELECT CAST(ROUND(ABS(MIN(LAT_N) - MAX(LAT_N)) + ABS(MIN(LONG_W) - MAX(LONG_W)), 4) AS DECIMAL(10,4)) FROM STATION

oracle

SELECT ROUND(ABS(MIN(LAT_N)-MAX(LAT_N)) + ABS(MIN(LONG_W)-MAX(LONG_W)), 4) FROM STATION MD;