Created
September 21, 2020 06:48
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| // Find Duplicate Rows// | |
| SELECT | |
| email, COUNT(email) | |
| FROM | |
| contacts | |
| GROUP BY | |
| HAVING | |
| COUNT(email) > 1; | |
| // End // | |
| //Delete Duplicate Rows// | |
| DELETE c1 FROM contacts c1 | |
| INNER JOIN contacts c2 | |
| WHERE | |
| c1.id > c2.id AND | |
| c1.email = c2.email; | |
| // End // |
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