CREATE TABLE "s3_tc_format_comparison" (
  "fourcc" text,
  "dx_10_name" text,
  "description" text,
  "alpha_premultiplied" text,
  "compression_ratio" text,
  "texture_type" text
);

Question: Which DX 10 Name that has a No Alpha premultiplied and a Description of explicit alpha?
SQL: SELECT "dx_10_name" FROM "s3_tc_format_comparison" WHERE "alpha_premultiplied"='no' AND "description"='explicit alpha';

Question: Which Compression ratio has a (none) DX 10 Name and a FOURCC of dxt4?
SQL: SELECT "compression_ratio" FROM "s3_tc_format_comparison" WHERE "dx_10_name"='(none)' AND "fourcc"='dxt4';

Question: Which Alpha premultiplied has a 4:1 Compression ratio and a dxt3 FOURCC?
SQL: SELECT "alpha_premultiplied" FROM "s3_tc_format_comparison" WHERE "compression_ratio"='4:1' AND "fourcc"='dxt3';