CREATE TABLE "features_comparison" (
  "version" text,
  "dock_connection" text,
  "aux_in" text,
  "battery" text,
  "i_phone_certified" text,
  "video_out" text,
  "dual_voltage" text
);

Question: How many times did the sounddock series II aux in?
SQL: SELECT COUNT("aux_in") FROM "features_comparison" WHERE "version"='SoundDock series II';

Question: Was the sounddock series I v2 iphone certified?
SQL: SELECT "i_phone_certified" FROM "features_comparison" WHERE "version"='SoundDock series I v2';

Question: How many connections aux in using FIrewire?
SQL: SELECT COUNT("aux_in") FROM "features_comparison" WHERE "dock_connection"='FireWire';

Question: how many video out connections does the sounddock portable have?
SQL: SELECT COUNT("video_out") FROM "features_comparison" WHERE "version"='SoundDock Portable';

Question: Does the sounddock series I v2 have dual voltage?
SQL: SELECT "dual_voltage" FROM "features_comparison" WHERE "version"='SoundDock series I v2';

Question: What type of dock connection does the sounddock series III have? 
SQL: SELECT "dock_connection" FROM "features_comparison" WHERE "version"='SoundDock series III';