If the weight is 126g and the NFC is yes, what is the battery (MAH)?
CREATE TABLE "smartphones" (
  "code_name" text,
  "market_name" text,
  "platform" text,
  "release_date" text,
  "android_version" text,
  "system_on_chip" text,
  "ram" text,
  "rom" text,
  "display" text,
  "weight" text,
  "battery_m_ah" real,
  "bluetooth" text,
  "wi_fi" text,
  "nfc" text,
  "camera" text,
  "network" text
);
SELECT "battery_m_ah" FROM "smartphones" WHERE "nfc"='Yes' AND "weight"='126g';