CREATE TABLE "400_w_sub_bands" (
  "band" real,
  "frequency_m_hz" text,
  "wavelength" text,
  "type" text,
  "power_w" real
);

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

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

Question: What is the Wavelength of Frequency (MHz) 14.050–14.150?
SQL: SELECT "wavelength" FROM "400_w_sub_bands" WHERE "frequency_m_hz"='14.050–14.150';