CREATE TABLE table_171236_2 (area_km_2 VARCHAR2, official_name VARCHAR2)

What is the Area KM 2 of Rothesay?
SELECT COUNT(area_km_2) FROM table_171236_2 WHERE official_name = "Rothesay"
SELECT COUNT("area_km_2") FROM "table_171236_2" WHERE "Rothesay" = "official_name"