題庫堂
檢索
題庫堂
首頁
數學
英文學習
政治學
統計學
經濟學
藥理學
中醫藥物學
財政學
法學知識
公共行政
警察學
BI規劃師
財務管理
公共衛生學
工程經濟學
電力電子學
當前位置:
首頁
29.對關聯式資料庫之敘述,下列何者不正確?(A)表格(Table)是構成資料庫的基本單位(B)每一表格至少應有一個主鍵(C)主鍵之鍵值應唯一(Unique),不能重複(D)表格索引可加快查詢速度,所
問題詳情
29.對關聯式資料庫之敘述,下列何者不正確?
(A)表格(Table)是構成資料庫的基本單位
(B)每一表格至少應有一個主鍵
(C)主鍵之鍵值應唯一(Unique),不能重複
(D)表格索引可加快查詢速度,所以索引越多越好
參考答案
上一篇 :
28.在資料結構中,依其層次,由高至低排列之正確順序為何?(A)資料庫一^資料表一^記錄一^棚位 (B)資料庫一^資料表一^棚位一^記錄(C)資料表一^資料庫一^記錄一^棚位 (D)資料表一^棚位一^
下一篇 :
27.在資料庫規劃中,將資料的重複性降到最低的過程稱為:(A)正規化 (B)階層化 (C)結構化 (D)模組化
資訊推薦
30.下列何者係存取關連式資料庫之常用語言?(A) SQL (B) Java (C) VB.NET (D) PHP
31.在SQL( Structured Query Language )語言中,SELECT指令之用途為下列何者?(A)查詢資料表格 (B)新增資料表格 (C)修改資料表格 (D)刪除表格資料
【題組】⑵由於日幣匯率的暴漲,到日本的外國人被迫做極度寒酸的旅行。編輯私有筆記及自訂標籤外國文(日文;包括作文、翻譯與應用文)-108 年 - 高考二級 日文(包括作文、翻譯與應用文)#79560討論
5. 如右圖所示的電晶體電路,二極體之功用為 (A)溫度補償(B)半波整流(C)防止雜音(D)保護電晶體
3. Afraid of being discovered, the thief lay on his belly in the darkness andheld his breath ______
4. Mr. Smith’s house is _____ Endsleigh Street, Bloomsbury though hefrequently stays at his hut in B
2. South Korea and Taiwan, _____ make and export various kinds ofhigh-tech goods, like cell phones,
1. 經勞動檢查機構以書面通知之檢查結果,事業單位應於該違規場所顯明易見處公告幾日以上?(A)30 (B)10 (C)15 (D)7
7. Running for the chair of the college, Mr. Brown seemed to say ______ came to his mind, without wa
【題組】⑷ Fecal Coliform 及 Fecal Streptococcus 在污染來源鑑定上的意義。編輯私有筆記及自訂標籤 環境化學與環境微生物學-108 年 - 高考二級 環境化學與環境微
5. I _____ ten acres of land and I grow numerous vegetable crops there.(A) am owning (B) own (C) hav
12. In the novel, the narrator is one of the few truly successful characters interms of distributive
17. A _____ is an official suggestion that someone should get a job or aprize, or the decision to gi
18. In your research paper, do use the _____ “kg” for “kilograms,” withoutany period after it.(A) ab
20. In any serious illness, if you _____, food and drink comes back up fromyour stomach and out thro
15. When I stayed in a shared self-catered accommodation during studyingabroad, my roommate frequent
6. Get your homework ____ before you watch television tonight.(A) complete (B) done (C) down (D) end
10. He _____ a book about international law for a long time.(A) writes (B) wrote (C) have been writi
9. Professor Higgins had _____ students read three novels, all written byNathaniel Hawthorne, in one
8. Grandfather left Rosalita and Raoul all _____ money.(A) her (B) hers (C) his (D) their
11. In the past, science was taught by the textbook method; _____ it istaught by the laboratory meth
22. Whether you love or hate cold weather, these _____ close-up photos ofsnowflakes will make you lo
13. There have been several accidents reported involving passengers _____ from trains.(A) dropped (B
24. Blood contains iron within red blood cells, and any slow, chronic blood loss within the body, s
16. The rice whiskey requires sticky rice to be steamed and washed, thenfermented with _____ for a f