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.

题目

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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    All children want to have pocket money. Why do their parents just give them a certain amountOne main purpose is to let kids learn _____their own money. First of all, children are expected to _____a choice between spending and saving. Then parents should make the children understand what is expected to pay for with the money. Pocket money can give children a chance to experience the three things _____they can do with the money. They can spend it by giving it to a good cause. They can spend it _____buying things they want.They can save it for future use.Saving helps children _____that costly goals require sacrifice. Saving can also open the door to future saving and investing for children.

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    参考答案：子问题 1:B; 子问题 2:C; 子问题 3:A; 子问题 4:C; 子问题 5:B

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    [C] form.

    [D] against


    正确答案：B

  • 第3题：

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