Table: amateur_radio_bands
Columns: band
frequency_mhz
wavelength
type
power_w

Question: What Band number has a Power (W) of 400 or less?
SQL: SELECT SUM("band") FROM amateur_radio_bands WHERE "power_w" < 400

Question: What Band's Power (W) is 400 or less?
SQL: SELECT MAX("band") FROM amateur_radio_bands WHERE "power_w" > 400

Question: What is the Wavelength of Frequency (MHz) 14.050–14.150?
SQL: SELECT "wavelength" FROM amateur_radio_bands WHERE "frequency_mhz" = '14.050–14.150'