Databases and Access.

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Presentation transcript:

Databases and Access

a collection of related information What is a database? A database is a collection of related information

Data is stored in... Tables Records Fields tblTutors Name Room Phone Jenny B34D 6717 Gordon B34D 6851 Ian 6854 Janet B34A 6708 Field – smallest complete unit Record – collection of fields with data in them Table – collection of records defined with the same structure

Tables are related… Name Room Phone Jenny B34D 6717 Gordon 6851 Ian 6854 Janet B34A 6708 tblTutors Module Tutor Room D1-G Jenny 131 D1-A 128 AP-B Ian B43 IN-K Janet tblModules ID 1 2 3 4 1 3 4 Primary key – unique identifier Foreign key – provides link

A database consists of… Tables – Storage Forms – Input Queries/Reports – Output Macros/Modules - Automation

Naming Convention [prefix][tag][BaseName][Suffix] tblSuppliers frmSuppliersAndProducts sfrmProducts tblCountryLookup

A Relational Database Management System (RDBMS) Access is… A Relational Database Management System (RDBMS)

Review An Access database is a single file .mdb extension All objects (tables, forms etc.) are stored inside it You can view tables in two ways Design View Define fields, data types and properties Table View Browse, enter and edit data The primary key for each table is a unique identifier for each record