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【单选题】
在SQL的数据定义功能中，下列命令格式可以用来修改表中字段名的是A.
CREATE TABLE数据表名NAME．．．
B.
ALTER TABLE数据表名ALTER字段名．．．
C.
ALTER TABLE数据表名RENAME COLUMN字段名TO．．．
D.
ALTER TABLE数据表名ALTER字段名SET DEFAULT．．．
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A.
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B.
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C.
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D.
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A.
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B.
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C.
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D.
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A.
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B.
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C.
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D.
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