CREATE TABLE table_19083 ("Code" FLOAT, "County" TEXT, "Former Province" TEXT, "Area  ( km 2  ) " TEXT, "Population Census 2009" FLOAT, "Capital" TEXT)

What capital has a population of 596268?
SELECT "Capital" FROM table_19083 WHERE "Population Census 2009" = '596268'
SELECT "Capital" FROM "table_19083" WHERE "Population Census 2009" = '596268'