格式:PPT 页数:13 大小:455KB《Access 数据库 数据库管理系统DBMS(database .ppt》由会员分享,可在线阅读,更多相关《Access 数据库 数据库管理系统DBMS(database .ppt(13页珍藏版)》请在麦多课文档分享上搜索。 1、专业网页制作教程网站:,Access 数据库“数据库管理系统DBMS”(database management system)则是用...
◇ Database management system: Data management system is a software that controls the data in a database, including overall organization, storage, retrieval, security, and data integrity. A DBMS can also format reports for printed output and can import and export data from other application using...
Insulationbetweenprogramsanddata:Calledprogram-dataindependence.AllowschangingdatastoragestructuresandoperationswithouthavingtochangetheDBMSaccessprograms. DataAbstraction:Adatamodelisusedtohidestoragedetailsandpresenttheuserswithaconceptualviewofthedatabase. Supportofmultipleviewsofthedata:Eachusermayseeadifferentviewofthe...
?Silberschatz, Korth and Sudarshan See for conditions on re-use Chapter 1: Introduction Database Management System (DBMS) DBMS contains information about a particular enterprise Collection of interrelated data Set of programs to access the data An environment that is both convenient and efficient to ...
DatabaseManagement(英文版).pptx Chapter11DatabaseManagement ComputerEnglish Chapter11DatabaseManagement 1 Chapter11DatabaseManagement Keypoints:usefultermsanddefinitions ofDatabaseManagement Difficultpoints:Classificationofthelogical structuringtechniquesofDBMS 计算机专业英语 2 Chapter11DatabaseManagement Requirements:1...
DBMSARCHITECTURE Thephysicalarchitectureisconcernedwiththes/wcomponentsthatmakeupaDBMS. ExternalorViewLevel ConceptualLevel InternalorPhysicalLevel ThreeLevelArchitectureofDBMS Amajorpurposeofadatabasesystemistoprovideuserswithanabstractviewofthedata.Thatis,thesystemhidescertaindetailsofhowthedataisstoredandmaintained...
Database system concepts PPT DatabaseConceptSystems 李楠(SophiaLi)lin@zucc.edu.cn DatabaseSystemConcepts-5thEdition,May23,2005 1.1 ©Silberschatz,KorthandSudarshan CourseIntroduction Agenda:Why?What?How?FinalResult!!!AdministrativeInformation DatabaseSystemConcepts-5thEdition,May23,2005...
Screen 5 Adding Fields To add a field to an Access table Open the table in Design view Right-click the row below where you want to add a field Choose Insert Rows Enter the field name, data type, and description Save the table Click the mouse or tap the RIGHT...
Access to this data is usually provided by a “database management system” (DBMS) consisting of an integrated set of computer software that allows users to interact with one or more databases and provides access to all of the data contained in the database (although restrictions may exist ...
lAtomicityofupdates4Failuresmayleavedatabaseinaninconsistentstatewithpartialupdatescarriedout4Example:Transferoffundsfromoneaccounttoanothershouldeithercompleteornothappenatall lConcurrentaccessbymultipleusers4Concurrentaccessneededforperformance4Uncontrolledconcurrentaccessescanleadtoinconsistencies–Example:Twopeoplereadinga...