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📜  如何在sql代码示例中找到对称对

📅  最后修改于: 2022-03-11 15:05:15.432000             🧑  作者: Mango

代码示例1
SELECT f1.X, f1.Y FROM Functions AS f1 WHERE f1.X = f1.Y GROUP BY f1.X, f1.Y HAVING COUNT(*) > 1