CREATE TABLE table_20641 ("Danish name" CLOB, "English name" CLOB, "Seat of administration" CLOB, "Largest city" CLOB, "Population  ( January 1 ,  2008 ) " FLOAT, "Area  ( km\\u00b2 ) " FLOAT, "Pop. density  ( per km\\u00b2 ) " CLOB)

What is the minimum population of the region in which Roskilde is the largest city?
SELECT MIN("Population (January 1, 2008)") FROM table_20641 WHERE "Largest city" = 'Roskilde'
SELECT MIN("Population (January 1, 2008)") FROM "table_20641" WHERE "Largest city" = 'Roskilde'