CREATE TABLE "table1_272313_1" (
  "vertical" real,
  "horizontal" real,
  "aspect_ratio" text,
  "pixel_aspect_ratio" text,
  "scanning" text,
  "frame_rate_hz" text
);

Question: What was the aspect ratio if the vertical pixel is 480 and pixel aspect ratio is 1:1?
SQL: SELECT "aspect_ratio" FROM "table1_272313_1" WHERE "vertical"=480 AND "pixel_aspect_ratio"='1:1';

Question: What was the minimum vertical measurement if the aspect ratio is 16:9 and scanning is interlaced?
SQL: SELECT MIN("vertical") FROM "table1_272313_1" WHERE "aspect_ratio"='16:9' AND "scanning"='interlaced';

Question: What was the maximum vertical measurement if the horizon measurement is 640?
SQL: SELECT MAX("vertical") FROM "table1_272313_1" WHERE "horizontal"=640;