CREATE TABLE "relief" (
  "table_2_depression_data" text,
  "1929" real,
  "1931" real,
  "1933" real,
  "1937" real,
  "1938" real,
  "1940" real
);

Question: What is the sum of 1938 values where 1933 values are under 68.3 and 1940 valures are under 4.02?
SQL: SELECT SUM("1938") FROM "relief" WHERE "1933"<68.3 AND "1940"<4.02;

Question: What is the average 1940 value where 1929 values are 101.4 and 1933 values are over 68.3?
SQL: SELECT AVG("1940") FROM "relief" WHERE "1929"=101.4 AND "1933">68.3;

Question: What is the highest 1937 value that has a 1940 value over 126?
SQL: SELECT MAX("1937") FROM "relief" WHERE "1940">126;