CREATE TABLE "chart_the_eight_wives" (
  "year_of_marriage" real,
  "name" text,
  "her_age" real,
  "his_age" real,
  "num_of_children" real
);

Question: What is the mean year of marriage when her age was more than 19 and his age was 30?
SQL: SELECT AVG("year_of_marriage") FROM "chart_the_eight_wives" WHERE "her_age">19 AND "his_age"=30;

Question: What is the lowest figure for her age when the year of marriage is before 1853, the number of children is less than 8, and the bride was Eliza Maria Partridge?
SQL: SELECT MIN("her_age") FROM "chart_the_eight_wives" WHERE "year_of_marriage"<1853 AND "num_of_children"<8 AND "name"='eliza maria partridge';

Question: What is the total number of her age figures where his age is less than 33, the bride was diontha walker, and the number of children was less than 0?
SQL: SELECT SUM("her_age") FROM "chart_the_eight_wives" WHERE "his_age"<33 AND "name"='diontha walker' AND "num_of_children"<0;