CREATE TABLE "writing" (
  "gzip" text,
  "bzip2" text,
  "lha_lzh" text,
  "stuff_it" text,
  "stuff_it_x" text,
  "iso_cd_image" text
);

Question: What is the Stuffit ability that has a gzip of yes, ISO/CD images of no and LHA/LZH of no?
SQL: SELECT "stuff_it" FROM "writing" WHERE "gzip"='yes' AND "iso_cd_image"='no' AND "lha_lzh"='no';

Question: What is the gzip value associated with a stuffit of no, bzip2 of no, and LHA.LZH of no?
SQL: SELECT "gzip" FROM "writing" WHERE "stuff_it"='no' AND "bzip2"='no' AND "lha_lzh"='no';

Question: What is the bzip2 value associated with a gzip of yes, StuffitX of unknown, and ISO/CD image of unknown?
SQL: SELECT "bzip2" FROM "writing" WHERE "gzip"='yes' AND "stuff_it_x"='unknown' AND "iso_cd_image"='unknown';

Question: What is the StuffitX value that has a Stuffit of unknown, LHA/LZH of yes, and unknown ISO/CD image?
SQL: SELECT "stuff_it_x" FROM "writing" WHERE "stuff_it"='unknown' AND "lha_lzh"='yes' AND "iso_cd_image"='unknown';

Question: What is the stuffit that has bzip and LHA/LZH of no?
SQL: SELECT "stuff_it" FROM "writing" WHERE "bzip2"='no' AND "lha_lzh"='no';

Question: What is the ISO/CD image value associated with StuffitX of no, gzip of yes, and LHA/LZH of yes?
SQL: SELECT "iso_cd_image" FROM "writing" WHERE "stuff_it_x"='no' AND "gzip"='yes' AND "lha_lzh"='yes';