Which Alpha premultiplied has a 4:1 Compression ratio and a dxt3 FOURCC?
CREATE TABLE "s3_tc_format_comparison" (
  "fourcc" text,
  "dx_10_name" text,
  "description" text,
  "alpha_premultiplied" text,
  "compression_ratio" text,
  "texture_type" text
);
SELECT "alpha_premultiplied" FROM "s3_tc_format_comparison" WHERE "compression_ratio"='4:1' AND "fourcc"='dxt3';