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)

Visualize a pie chart about the proportion of Sex and the sum of Height.
SELECT Sex, SUM(Height) FROM people GROUP BY Sex
SELECT "Sex", SUM("Height") FROM "people" GROUP BY "Sex"