共找到 1003 与BOOK 相关的结果,耗时10 ms
由于同一个分类目录号(同一种图书)有多个副本,若用表Book(图书流水号,分类目录号,书名,作者,内容摘要,价格,购书日期)存储图书信息则有很多的冗余信息,该如何分解使之满足BCNF,并指出分解后的关系模式的主键。
要查询book表中所有书名以“电子商务”开头的书籍作者,可用(61)语句。A.SELECT author FROM booK WHERE book _name=‘电子商务*’B.SELECT author FROM booK WHERE book _name LIKE‘电子商务*’C.SELECT
● 在XML中,元素book 的声明语句如下:该声明语句表明,元素book中子元素 (62) 至少出现一次。A. title B. price C. author D. borrow
The book has been translated into thirty langungen tince it on the markat in 1973.
The text is most likely to be found in a book aboutA. popular scienceB. historical eventsC. successful peopleD. political systems
The bow-to book can be of help to _______ wants to do the job.A.who B.whomeverC.no matter whoD.whoever
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