SQL: Duplicate Emails
Medium
SQL — Aggregation
SQL
GROUP BY
HAVING
Find all duplicate email addresses.
Constraints
Write standard SQL (MySQL 8.0 compatible).
Examples
Example 1:
Input: email
[email protected]
[email protected]
[email protected]
Output:
Example 2:
Input: email
[email protected]
[email protected]
[email protected]
Output:
Hints
GROUP BY email HAVING COUNT > 1.
Tests:
Runtime:
Memory:
Test
Input:
Expected:
Got:
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