--- tags: sql, LeetCode --- # 1693. Daily Leads and Partners (資訊來自於`leetcode 1693`[ Daily Leads and Partners](https://leetcode.com/problems/daily-leads-and-partners/)) ### 每日線索和合作夥伴  編寫一個 SQL 查詢,對於每個date_idand make_name,返回不重複 lead_id和不重複 partner_id的數量。  ### 解題方式: ```sql= SELECT date_id, make_name, count(distinct lead_id) unique_leads, count(distinct partner_id) unique_partners from DailySales group by date_id,make_name ``` ### 解題解析: 利用sql的distinct的關鍵字來過濾重複出現的紀錄值,這樣我們就可以取得題目所需要的不重複值
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