CREATE TABLE table_19128 ("Country or territory with flag" TEXT, "Area  ( km\\u00b2 )   ( per sqmi ) " TEXT, "Population  ( July 2009 est. ) " FLOAT, "Population density per km\\u00b2" TEXT, "Capital" TEXT)

What unit of measurement for uruguay?
SELECT "Area (km\u00b2) (per sqmi)" FROM table_19128 WHERE "Country or territory with flag" = 'Uruguay'
SELECT "Area (km\u00b2) (per sqmi)" FROM "table_19128" WHERE "Country or territory with flag" = 'Uruguay'