CREATE TABLE table_20524 ("Channel" FLOAT, "Band" TEXT, "Video Frequency" TEXT, "Audio Frequency" TEXT, "Station" TEXT, "Network" TEXT, "Transmission" TEXT, "Format" TEXT, "Status" TEXT)

How many networks are there that have a channel number 7?
SELECT COUNT("Network") FROM table_20524 WHERE "Channel" = '7'
SELECT COUNT("Network") FROM "table_20524" WHERE "Channel" = '7'