An Introduction toDatabase Systems 資料庫系統(tǒng)課件

AnIntroductionto

DatabaseSystems

資料庫系統(tǒng)陳日昌Fall20091Contents內容綱要Introduction(1wk)SQL:DMLandDDL(4wks)ConstraintsandTriggers(1wk),E/Rmodeling(2wks)andE/RCASETool(2wks)FunctionalDependencies(1wk),SqliteorPostgres(optional)DrillsandExams2Whylearnthis?

我可以學到什麼？目標資料庫系統(tǒng)的基本知識操作資料庫的方法(DataManipulation)分析並定義資料庫(ModelingandDefinition)程式介面(ProgrammingInterface)工作與就業(yè)能力3Syllabus授課規(guī)定時間：每週三小時Textbook課本：講義與Internet作業(yè)就是考試題目課堂時間規(guī)定：請尊重他人權益聯(lián)絡：Subject:[DB4S]主旨例如:[DB4S]考試時間?5主要參考書與網(wǎng)路資料DatabaseSystemsTheCompleteBook,(“DSCB”)Garcia-Molina,Ullman,WidomJeffUllman'sofferingoftheCS145courseintheAutumnof2004Chap1-2FreeDownload滄海書局6圖書館「指定參考書」“Database–Design,ApplicationDevelopment&Administration,”2ndEd.MichaelV.Mannino資料庫管理設計及其應用翻譯：劉金順普林斯頓出版高立圖書7CourseWebsite

講義資料請自行查看講義並下載軟體多媒體補救教學資料有關英文從Keywords〈關鍵字〉學起把握技術英文以及常用字：一再出現(xiàn)才查正確觀念：不必恐懼或崇拜9Grading作業(yè)與考試評分Midterm50pts,Final40pts,other10pts上機實作考試OpenbookandnotesNodiscussion,nocommunication(獨立作業(yè))1makeup*作弊？當?shù)?！沒有補考或補救方法延畢？依照校規(guī)處理10Questions?歡迎提問11Chapter1(DSCB)

TheWorldsofDatabaseSystemsDatabasesareeverywhere!Internalrecordsandmanagement內部管理Presentingdata(e.g.,WWW)ScientificorengineeringdataSpecializedsoftwareforthisiscalledadatabasemanagementsystem,DBMS,orsimply“databasesystem.”13KeyFeaturesPersistentstorage–morethanaProgramminginterface–throughapowerfulquerylanguageTransactionmanagement–supportsconcurrent,i.e.,simultaneous,accesstodatabymultipleprocesses(called“transactions”–「交易」)14“Whatisadatabase?”通常只是持續(xù)存在多年的一些資訊常識上而言–由DBMS管理的一些資訊DBMS通常能夠提供以下功能經(jīng)由Data-DefinitionLanguage(DDL)定義新資料庫或稱Schema經(jīng)由Data-ManipulationLanguage(DML)或稱QueryLanguage讓使用者詢問或修改大量資料、長時間、多使用者同時使用15“RelationalDatabases”

TedCodd,1970Asimpleviewofdataintablesorcalledrelations排名出賽戰(zhàn)績勝率勝差誠泰7140勝7和24敗0.6250興農(nóng)7036勝5和29敗0.5544.5兄弟7336勝4和33敗0.5226.5統(tǒng)一7133勝2和36敗0.4789.5中信7232勝2和38敗0.4571117DSCBExampleArelationnamedAccountsaccountNobalancetype123451000.00savings678902846.92checking………欄位名稱Attributes(屬性)如accountNo,balance,type.資料列稱為Rows或Tuples18SomeQueries要查帳號67890的餘額SELECTbalanceFROMAccountsWHEREaccountNo=67890要查儲蓄餘額為負的帳號SELECTaccountNoFROMAccountsWHEREtype=‘saving’ANDbalance<0存取、處理詢問、增進處理效率等問題都交給資料庫管理系統(tǒng)19Client-ServerandMulti-TierArchitecture客戶-伺服器Two-Tier(兩層)到Three-Tier(三層)Client-Webserver-DBMSFour-Tier(四層)Client-Webserver-ApplicationServer-DBMSMore…21EmbeddedDatabases不區(qū)分客戶-伺服器，附帶於單一程式內例如SQLite()使用於：Mozilla(browser)Symbian(SmartphoneOS)iPhone(Applesmartphone)gPhone(Googlesmartphone)22MultimediaDataVideo,images,audio,andother“signals.”“BLOB”(BLockOfBinary)datatypeHowtosearchforaparticularblobdata?Forexample,googleimagesearchOO(ObjectOriented)approachMultimediadatadeliveryisnotconventional;音樂/電影資料庫的播放23OverviewofaDBMS

(Fig.1.1,DSCB)DMLprocessingQuerycompilerExecutionengine,buffermanager,storagemanagerTransactionprocessingTransactionmanagerLoggingandrecoveryConcurrencycon