EvaluatetheCREATETABLEstatement:CREATETABLEproducts(product_idNUMBER(6)CONSTRAINTprod_id_pkPRIMARYKEY,product_nameVARCHAR2(15));WhichstatementistrueregardingthePROD_ID_PKconstraint?()A.Itwouldbecreatedonlyifauniqueindexismanuallycreatedfirst.B.Itwouldbecr

题目
EvaluatetheCREATETABLEstatement:CREATETABLEproducts(product_idNUMBER(6)CONSTRAINTprod_id_pkPRIMARYKEY,product_nameVARCHAR2(15));WhichstatementistrueregardingthePROD_ID_PKconstraint?()

A.Itwouldbecreatedonlyifauniqueindexismanuallycreatedfirst.

B.Itwouldbecreatedandwoulduseanautomaticallycreateduniqueindex.

C.Itwouldbecreatedandwoulduseanautomaticallycreatednonuniqueindex.

D.Itwouldbecreatedandremainsinadisabledstatebecausenoindexisspecifiedinthecommand.


相似考题
更多“EvaluatetheCREATETABLEstatement:CREATETABLEproducts(product_idNUMBER(6)CONSTRAINTprod_id_pkPRIMARYKEY,product_nameVARCHAR2(15));WhichstatementistrueregardingthePROD_ID_PKconstraint?() ”相关问题
  • 第1题:

    若将文本字符串"15"、"8"、"6"按降序排序,则排序的结果为( )。

    A.15、"8"、"6"

    B.6、"8"、"15"

    C.8、"6"、"15"

    D.8、"15"、"6"


    正确答案:C
    解析:Access中字符串的排序是根据第一个字符的ASCII码值的大小进行。

  • 第2题:

    建立文字 “6xФ15”,可输入如下哪项内容?

    A.6x%%15c

    B.6x%%15d

    C.6x%%d15

    D.6x%%c15


    D.6x%%c15

  • 第3题:

    22碳6烯酸(DHA)正确写法是

    A.22:6ω3,6,9,12,15,18

    B.22:6△3,6,9,12,15,18

    C.22:6△3,6,9,12,15,18

    D.22:6ω6,9,12,15,18,21


    22:6 ω3,6,9,12,15,18

  • 第4题:

    设X~N(9,32),Y~N(5,0.52),则有________成立。

    A.P(6<X≤15)>P(4.5<Y≤6)

    B.P(6<X≤15)<P(4.5<Y≤6)

    C.P(6<X≤15)=P(4.5<Y≤6)

    D.P(6<X≤15)>2P(4.5<Y≤6)


    正确答案:C
    解析:P(6<X≤15)=Φ((15-9)/3)-Φ((6-9)/3)=Φ(2)-Φ(-1);P(4.5<Y≤6)=Φ((6-5)/0.5)-Φ((4.5-5)/0.5)=Φ(2)-Φ(-1)。

  • 第5题:

    22碳6烯酸(DHA)正确写法是

    A.22:6△3,6,9,12,15,18

    B.22:6△6,9,12,15,18,21

    C.22:6ω3,6,9,12,15,18

    D.22:6ω6,9,12,15,18,21


    22:6 ω3,6,9,12,15,18