CREATE TABLE table_204_268 (id DECIMAL, "album/single" TEXT, "performer" TEXT, "year" DECIMAL, "variant" TEXT, "notes" TEXT)

which album has the same name as its performer ?
SELECT "album/single" FROM table_204_268 WHERE "album/single" = "performer"
SELECT "album/single" FROM "table_204_268" WHERE "album/single" = "performer"