题目内容

检索“至少选修课程号为′C1′的学生姓名(SNAME) ”的SQL语句是

A. SELECT s.sname FROM s,sc WHERE c.cno=′C1′
B. SELECT s.sname FROM s,sc WHERE c.cno=′C1′AND s.sno=sc.sno
C. SELECT s.sname FROM s,sc FOR c.cno=′C1′
D. SELECT s.sname FROM s,sc FOR c.cno=′C1′AND s.sno=sc.sno

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