查询students表中所有女学生的姓名、性别和所学专业,其代码如下:
A.SELECTsnameas姓名,xbas性别,zhyas专业 FROMstudentsWHERExb=女;
B.SELECTsnameas姓名,xbas性别,zhyas专业 FROMstudentsWHERE xb=’女’;
C.SELECTsnameas姓名,xbas性别,zhyas专业 FROMstudentsWHERE xb LIKE女;
D.SELECTsnameas姓名,xbas性别,zhyas专业 FROMstudentsWHERE xb==’女’;