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Which of the following conditions will make a relation that is in first normal form. to be in second normal form?
Ⅰ.every non-key attribute is functionally dependent on the full set of primary key attributes.
Ⅱ.no non-key attributes exist in the relation.
Ⅲ.the primary key consists of only one attribute.
A．Ⅰ only
B．Ⅰ and Ⅱ only
C．Ⅰ and Ⅲ only
D．any of them
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更多 “ Which of the following conditions will make a relation that is in first normal form. to be in second normal form?Ⅰ.every non-key attribute is functionally dependent on the full set of primary key attributes.Ⅱ.no non-key attributes exist in the relation.Ⅲ.the primary key consists of only one attribute.A．Ⅰ onlyB．Ⅰ and Ⅱ onlyC．Ⅰ and Ⅲ onlyD．any of them ” 相关考题
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