CREATE TABLE table_18792 ("City of license /Market" TEXT, "Station" TEXT, "Channel TV  (  DT  ) " TEXT, "Owned since" TEXT, "Primary affiliation" TEXT)

How many channel tv (dt)s are in austin, texas?
SELECT COUNT("Channel TV ( DT )") FROM table_18792 WHERE "City of license /Market" = 'Austin, Texas'
SELECT COUNT("Channel TV ( DT )") FROM "table_18792" WHERE "City of license /Market" = 'Austin, Texas'