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设有学生表S(学号,姓名,性别,年龄),查询所有年龄小于等于18岁的女同学,并按年龄进行降序排序生 成新的表WS,正确的SQL命令是()
A.SELECT*FROMSWHERE性别=女AND年龄<=18ORDERBY4DESCINTOTABLEWS
B.SELECT*FROMSWHERE性别=女AND年龄<=18ORDERBY年龄INTOTABLEWS
C.SELECT*FROMSWHERE性别=女AND年龄<=18ORDERBY年龄DESCINTOTABLEWS
D.SELECT*FROMSWHERE性别=女OR年龄<=18ORDERBY年龄AsCINTOTABLEWS
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