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57 lines
2.4 KiB
HTML
57 lines
2.4 KiB
HTML
<p>表：<code>DailySales</code></p>
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<pre>
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+-------------+---------+
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| Column Name | Type |
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+-------------+---------+
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| date_id | date |
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| make_name | varchar |
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| lead_id | int |
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| partner_id | int |
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+-------------+---------+
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该表没有主键。
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该表包含日期、产品的名称，以及售给的领导和合伙人的编号。
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名称只包含小写英文字母。</pre>
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<p> </p>
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<p>写一条 SQL 语句，使得对于每一个 <code>date_id</code> 和 <code>make_name</code>，返回<strong>不同</strong>的 <code>lead_id</code> 以及<strong>不同</strong>的 <code>partner_id</code> 的数量。</p>
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<p>按 <strong>任意顺序</strong> 返回结果表。</p>
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<p>查询结果格式如下示例所示。</p>
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<p> </p>
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<p><strong>示例 1:</strong></p>
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<pre>
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<strong>输入：</strong>
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DailySales 表：
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+-----------+-----------+---------+------------+
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| date_id | make_name | lead_id | partner_id |
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+-----------+-----------+---------+------------+
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| 2020-12-8 | toyota | 0 | 1 |
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| 2020-12-8 | toyota | 1 | 0 |
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| 2020-12-8 | toyota | 1 | 2 |
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| 2020-12-7 | toyota | 0 | 2 |
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| 2020-12-7 | toyota | 0 | 1 |
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| 2020-12-8 | honda | 1 | 2 |
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| 2020-12-8 | honda | 2 | 1 |
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| 2020-12-7 | honda | 0 | 1 |
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| 2020-12-7 | honda | 1 | 2 |
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| 2020-12-7 | honda | 2 | 1 |
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+-----------+-----------+---------+------------+
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<strong>输出：</strong>
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+-----------+-----------+--------------+-----------------+
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| date_id | make_name | unique_leads | unique_partners |
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+-----------+-----------+--------------+-----------------+
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| 2020-12-8 | toyota | 2 | 3 |
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| 2020-12-7 | toyota | 1 | 2 |
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| 2020-12-8 | honda | 2 | 2 |
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| 2020-12-7 | honda | 3 | 2 |
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+-----------+-----------+--------------+-----------------+
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<strong>解释：</strong>
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在 2020-12-8，丰田（toyota）有领导者 = [0, 1] 和合伙人 = [0, 1, 2] ，同时本田（honda）有领导者 = [1, 2] 和合伙人 = [1, 2]。
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在 2020-12-7，丰田（toyota）有领导者 = [0] 和合伙人 = [1, 2] ，同时本田（honda）有领导者 = [0, 1, 2] 和合伙人 = [1, 2]。</pre>
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