電大數(shù)據(jù)庫應用技術期末試題考試資料小抄-在線瀏覽
2024-07-29 21:59本頁面
【正文】 類型。 2．當需要對查詢結果進行排序時，可以指定其排序方式，字段后使用（ ASC ）表示升序，（ DESC ）表示降序。 1．數(shù)據(jù)庫設計一般包括 需求分析 、 概念設計 、 邏輯設計 、 物理設計 、 數(shù)據(jù)庫實施 和 運行維護 等階段。 3．數(shù)據(jù)庫設計的主要原則包括 表設計原則 、 字段設計原則 和其他原則。 5．物理設計的主要內(nèi)容包括 存儲記錄的格式設計 、 存儲方法設計 、 訪問方法設計 以及 完整性和安全性考慮 。 2．備份是指將數(shù)據(jù)從硬盤復制到 可移動媒體 上的過程。 4．用戶使用 SQL Server數(shù)據(jù)庫時，一般需要經(jīng)過兩個安全性階段： 身份驗證 和權限認證。 1．關系模型由三個部分組成，分別是 數(shù)據(jù)結構 、關系操作集合和 關系的完整性 。 3． 數(shù)據(jù)庫應用系統(tǒng)的建設包括結構設計和 行為 設計 兩個方面。 5． SQL Server 中的事務處理控制語句， ROLLBACK [TRAN [SACTION] ] 實現(xiàn)回滾一個事務。 2．進行數(shù)據(jù)庫備份時，必須同時復制主數(shù)據(jù)文件和 事務日志文件。 4． 用戶使用 SQL Server數(shù)據(jù)庫 時， 一般 需要經(jīng)過兩個安全性階段：身份驗證 和權限認證。 2．能夠惟一標識某條記錄的屬性稱為 主鍵 。 4．備份是指將數(shù)據(jù)從硬盤復制到 可移動 媒體上的過程 。 2． SQL Server數(shù)據(jù)庫中的 NULL值（空值）表示的是 ? 空格 ?或 ?0? 值（ ） 3．一個不規(guī)范的關系模式通常會引發(fā)插入異常、刪除異常和更新異常，導致大量的數(shù)據(jù)冗余。（ √ ） 6．參照完整性規(guī)則通常是指在兩個參照和被參照關系中，參照關系中每條記錄的外鍵或者為空，或者等于被參 照關系中某條記錄的主鍵。 2．數(shù)據(jù)庫中只有一個模式，也只有一個內(nèi)模式，所以模式／內(nèi)模式映像是惟一的。 3． SQL Server數(shù)據(jù)庫中的 NULL值（空值）表示的是 ?空格?或? 0?值（ ） 4． SQL Server中的 tempdb數(shù)據(jù)庫是一個臨時數(shù)據(jù)庫，屬用戶數(shù)據(jù)庫（ ） 5． SQL 雖被稱為?查詢語言?，其功能卻不僅僅限于查詢（√ ） 1．計算機數(shù)據(jù)處理技術大致經(jīng)歷了人工管理、文件管理和 SQL Server 數(shù)據(jù)庫 管理三大階段（ ╳ ）。 3． SQL Server數(shù)據(jù)庫中的 NULL值（空值）表示的是 ?空格?或? 0?值（ ╳ ） 4．一個 不規(guī)范的關系模式通常會引發(fā)插入異常、刪除異常和更新異常，導致大量的數(shù)據(jù)冗余。（ ） 2．在教師任課關系（教師編號，教師姓名，教師職稱，課程號，課程名，課時費）中，主鍵是教師編號。 （√） 4．做結構設計時，要盡量使設計符合第三范式的要求。（√ ） ag an employment tribunal clai Emloyment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: you don39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。s antiracism taskforce, is in London for the Football Association39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Ya ya Toure, he told BBC Sport. For me it39。s 21 win. Michel Platini, president of European football39。s actions. CSKA said they were surprised and disappointed by Toure39。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do ?？傆X得自己似乎應該去做點什么，或者寫點什么。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。t really grow up, it seems is not so important。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。 instead o
試題試卷相關推薦
鄂ICP備17016276號-1