[LeetCode] 1693. Daily Leads and Partners

😎풀이

1. DailySales 조회
2. date_id, make_name을 기준으로 그룹화
3. date_id, make_name, 고유한 lead_id의 수, 고유한 partner_id의 수 반환환

SELECT
    date_id,
    make_name,
    COUNT(DISTINCT lead_id) AS unique_leads,
    COUNT(DISTINCT partner_id) AS unique_partners
FROM
    DailySales
GROUP BY 
    date_id, 
    make_name