Table: ptv_stations
Columns: branding
callsign
ch
power_kw
station_type
location_transmitter_site

Question: What is the callsign that has a station type of relay and a channel number of TV-2?
SQL: SELECT "callsign" FROM ptv_stations WHERE "station_type" = 'Relay' AND "ch" = 'TV-2'

Question: What is the station type of DWZM-TV?
SQL: SELECT "station_type" FROM ptv_stations WHERE "callsign" = 'DWZM-TV'

Question: What is the power in kilowatts of TV-12?
SQL: SELECT "power_kw" FROM ptv_stations WHERE "ch" = 'TV-12'

Question: What is the power in KW of the transmitter situated in Borongan?
SQL: SELECT "power_kw" FROM ptv_stations WHERE "location_transmitter_site" = 'Borongan'

Question: What is the channel number that has a branding of PTV 4 Laoag?
SQL: SELECT "ch" FROM ptv_stations WHERE "branding" = 'PTV 4 Laoag'

Question: What is the power in KW that has a station type of relay and a callsign of DXCL-TV?
SQL: SELECT "power_kw" FROM ptv_stations WHERE "station_type" = 'Relay' AND "callsign" = 'DXCL-TV'