CREATE TABLE table_203_485 (id DECIMAL, "year" TEXT, "show" TEXT, "role" TEXT, "notes" TEXT)

which television show was gauri in for the longest amount of time ?
SELECT "show" FROM table_203_485 ORDER BY "year" - "year" DESC LIMIT 1
SELECT "show" FROM "table_203_485" ORDER BY "year" - "year" DESC NULLS LAST LIMIT 1