题目内容:
删除学号为“20091001”且课程号为“C1”的选课记录,正确命令是( )。
A.DELETE FROM score WHERE课程号="C1"AND学号="20091001" B.DELETE FROM score WHERE课程号=”C1”OR学号="20091001"
C.DELETE score WHERE课程号="C1"AND学号="20091001"
D.DELETE score课程号="C1"OR学号="20091001"
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答案解析: