CREATE TABLE "external_links" (
  "rank" real,
  "family" text,
  "abbre_viation" text,
  "constellation" text,
  "area_sq_deg" real,
  "area_msr" real,
  "per_cent_age" text,
  "right_ascension_hm" real,
  "decli_nation_dm" text,
  "quad" text
);

Question: What is the largest Area (msr) that has an Area less than 291.045, is part of the Per family, and has a rank higher than 78?
SQL: SELECT MAX("area_msr") FROM "external_links" WHERE "area_sq_deg"<291.045 AND "family"='per' AND "rank">78;

Question: What is the total sum of Areas (sq.deg) that have an Area (msr) of 43.059 and a Right ascension (hm) larger than 747.73?
SQL: SELECT SUM("area_sq_deg") FROM "external_links" WHERE "area_msr"=43.059 AND "right_ascension_hm">747.73;