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43 lines
1012 B
HTML
43 lines
1012 B
HTML
<p>Table: <code>Person</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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| id | int |
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| email | varchar |
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+-------------+---------+
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id is the primary key (column with unique values) for this table.
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Each row of this table contains an email. The emails will not contain uppercase letters.
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</pre>
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<p> </p>
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<p>Write a solution to report all the duplicate emails. Note that it's guaranteed that the email field is not NULL.</p>
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<p>Return the result table in <strong>any order</strong>.</p>
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<p>The result format is in the following example.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong>
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Person table:
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+----+---------+
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| id | email |
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+----+---------+
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| 1 | a@b.com |
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| 2 | c@d.com |
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| 3 | a@b.com |
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+----+---------+
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<strong>Output:</strong>
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+---------+
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| Email |
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+---------+
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| a@b.com |
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+---------+
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<strong>Explanation:</strong> a@b.com is repeated two times.
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</pre>
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