CREATE TABLE table_3956 ("Code" CLOB, "District" CLOB, "Headquarters" CLOB, "Population  ( 2001 Census ) " FLOAT, "Population  ( 2011 Census ) " FLOAT, "Area  ( km\\u00b2 ) " FLOAT, "Density in 2011  ( /km\\u00b2 ) " CLOB)

How big (in km2) is the district with a code BW?
SELECT MIN("Area (km\u00b2)") FROM table_3956 WHERE "Code" = 'BW'
SELECT MIN("Area (km\u00b2)") FROM "table_3956" WHERE "Code" = 'BW'