oracle中怎么檢驗count？
SELECT * FROM T WHERE 學號 IN (SELECT 學號,COUNT(*) NUM FROM T GROUP BY 學號 HAVING COUNT(學號) >= 2)
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Hi,歡迎訪問前端老白
請登陸oracle中怎么檢驗count？
SELECT * FROM T WHERE 學號 IN (SELECT 學號,COUNT(*) NUM FROM T GROUP BY 學號 HAVING COUNT(學號) >= 2)