https://www.boostcourse.org/ds102/lecture/373356?isDesc=false
SELECT는 여러 절들과 함께 사용되어, 분석에 필요한 데이터를 조회한다.
절 - FROM, WHERE, GROUP BY, HAVING, ORDER BY
FROM X TABLE
WHERE GENDER MALE
GROUP BY DISTRICT
HAVING ONLY LESS THAN 100 PEOPLE
SELECT * (ALL COLUMNS)
ORDER BY DESCENDING ORDER NUMBER OF PEOPLE
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