Object-oriented DBMS integrated a variety of(81)data types-such as business procedures, gr
Object-oriented DBMS integrated a variety of(81)data types-such as business procedures, graphics, pictures, voice and annotated text.Object orientation also makes a(82)to application development efficiency. It makes the data, functions, attributes, and relationships an integral part of the(83). In this way, objects can be reused and replicated.Some leading RDBMS vendors support the concept of integrating object management capabilities with their current line of relational products. That capability enable users to the development cycle, since integrity logic and business roles no longer need to be programmed(84)each application.
A.tool
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C.idea
D.contribution
E.real-world
有关系模式R(S,T,C,D,G),根据语义有如下函数依赖集:F={(S,C) →T,C →D,(S 计算机类考试 2020-05-23 …
第(54)~(55)题基于以下描述:有关系模式R(S,T,C,D,G),根据语义有如下函数依赖集:F 计算机类考试 2020-05-23 …
基于以下描述:有关系模式R(S,T,C,D,G),根据语义有如下函数依赖集:F={(S,C)→T,C 计算机类考试 2020-05-23 …
集合R与S的差表示为()。A.{t|t∈R∨t∈S}B.{t|t∈R∧t∈S}C.{t|t∈R∧tS 计算机类考试 2020-05-24 …
设有关系R、S和T如下。关系T是由关系R和S经过______操作得到的。 R TA B C R.A 计算机类考试 2020-05-24 …
基于以下描述:有关系模式R(S, T, C, D, G),根据语义有如下函数依赖集:F={(S, C 计算机类考试 2020-05-24 …
设有关系模式W(C,P,S,C,T,R),其中各属性的含义是:C——课程,p——教师,S——学生,G 计算机类考试 2020-05-26 …
已知常数p>0,数列{an}满足an+1=|p-an|+2an+p,n∈N*.(1)若a1=-1, 数学 2020-07-21 …
(2013•珠海二模)在等比数列{an}中,若r,s,t是互不相等的正整数,则有等式ar−st•as 其他 2020-11-12 …
一个很简答的拉普拉斯变换数学问题请问,t[u(t)-u(t-a)],是如何计算出3个函数的,这个式子 其他 2020-12-31 …