Table: tv_broadcast_details
Columns: channel
band
video_frequency
audio_frequency
station
network
transmission
format
status

Question: How many networks are there that have a channel number 7?
SQL: SELECT COUNT("network") FROM tv_broadcast_details WHERE "channel" = 7

Question: What station on the network is tv3?
SQL: SELECT "network" FROM tv_broadcast_details WHERE "station" = 'TV3'