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SELECT学号FROM选课表WHERE COUNT(*)>=3 SELECT学号FROM选课表HAVING COUNT(*)>=3 SELECT学号FROM选课表GROUP BY学号HAVING COUNT(*)>=3 SELECT学号FROM选课表GROUP BY学号WHERE COUNT(*)>=3
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SELECT学号FROM选课表WHERE COUNT(*)>=3 SELECT学号FROM选课表HAVING COUNT(*)>=3 SELECT学号FROM选课表GROUP BY学号HAVING COUNT(*)>=3 SELECT学号FROM选课表GROUP BY学号WHERE COUNT(*)>=3
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SELECT 学号 FROM SC GROUP BY 学号 HAVING SUM (*)>3 SELECT 学号 FROM SC GROUP BY 学号 HAVING COUNT(*)>3 SELECT 学号 FROM SC GROUP BY 学号 HAVING 课程号>3 SELECT 学号 FROM SC WHERE 课程号>3 GROUP BY学号