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

Give me the comparison about the sum of Weight over the Sex , and group by attribute Sex by a bar chart.
SELECT Sex, SUM(Weight) FROM people GROUP BY Sex
SELECT "Sex", SUM("Weight") FROM "people" GROUP BY "Sex"