CREATE TABLE table_204_796 (id DECIMAL, "network name" TEXT, "flagship" TEXT, "programming type" TEXT, "owner" TEXT, "affiliates" DECIMAL)

which owner has the most networks ?
SELECT "owner" FROM table_204_796 GROUP BY "owner" ORDER BY COUNT("network name") DESC LIMIT 1
SELECT "owner" FROM "table_204_796" GROUP BY "owner" ORDER BY COUNT("network name") DESC NULLS LAST LIMIT 1