在线名词解释大全 - 数据库题目13 - 详细

查询所有有成绩的同学的学号。

A
SELECT s# FROM c WHERE grade is nulll
B
SELECT s# FROM s WHERE grade is nulll
C
SELECT s# FROM SC WHERE grade=nulll
D
SELECT s# FROM SC WHERE grade is nulll
正确答案:
SELECT s# FROM SC WHERE grade is nulll
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