πŸ“Œ[SQL 문제 풀이] Programmers - 쑰건에 λ§žλŠ” νšŒμ›μˆ˜ κ΅¬ν•˜κΈ°

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SELECT COUNT(age) as USERS
FROM USER_INFO
WHERE age >= 20 and age <= 29 and JOINED LIKE '2021%'
;
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