CREATE TABLE "comparison" (
  "model" text,
  "release_date" real,
  "price" text,
  "midi_inputs_outputs" text,
  "sampling_rate" text,
  "sampling_memory_upgrade_able" text,
  "sampling_time" text,
  "storage_method" text,
  "pad_banks" real
);

Question: Which Sampling Memory/Upgrade-able has a rate of 16-bit 44.1khz?
SQL: SELECT "sampling_memory_upgrade_able" FROM "comparison" WHERE "sampling_rate"='16-bit 44.1khz';

Question: Around what time frame release a Sampling Rate of 12-bit 40khz?
SQL: SELECT SUM("release_date") FROM "comparison" WHERE "sampling_rate"='12-bit 40khz';

Question: How much is a product with a Sampling Rate of 12-bit 40khz?
SQL: SELECT "price" FROM "comparison" WHERE "sampling_rate"='12-bit 40khz';