CREATE TABLE candidate (Candidate_ID NUMBER, People_ID NUMBER, Poll_Source CLOB, Date CLOB, Support_rate FLOAT, Consider_rate FLOAT, Oppose_rate FLOAT, Unsure_rate FLOAT)
CREATE TABLE people (People_ID NUMBER, Sex CLOB, Name CLOB, Date_of_Birth CLOB, Height FLOAT, Weight FLOAT)

Bar chart of total number of height from each sex
SELECT Sex, SUM(Height) FROM people GROUP BY Sex
SELECT "Sex", SUM("Height") FROM "people" GROUP BY "Sex"