A short introduction to database systems.ppt
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Rafael Tolosana 19 th February 2009 A short Introduction To Database Systems
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Transcript of A short introduction to database systems.ppt
Rafael Tolosana19th February 2009
A short Introduction To Database Systems
About myselfProfesor Ayudante (Graduate Assistant
Professor) at the Computer Science and Systems Engineering Department
Email address [email protected] for student advice (tutorías)
Mondays 10-14 hours
Vocabulary for todayDatabaseRelational
DatabaseTableRelationTo RetrieveTo Query / queryFormReportTuple or RecordAttribute
Base de datosBase de datos
relacionalTablaRelaciónRecuperarConsultar/ consultaFormularioInformeTupla o RegistroAtributo
Information vs DataInformation: facts
about a situation, person, event, etc.
Data = Organised / Structured information
Information Systemi.e. google
Database management systemi.e. the Social
Security Database Management System
Database ConceptDefinition: A database is a collection of
elements that allows you to store data, organise it and retrieve it in any way you want.
There are many different types of databases, the most utilised one is the relational database type
Relational DatabaseDefinition: A Relational Database is a
collection of relations which are frequently called tables (but also relations)
Elements of a Table
or Table
Picture extracted from Wikipedia
Record or
Table Example: Student info at unizar
Student PIN
Student Name
AddressEmail
Address
456913541131221023
Rafael Tolosana [email protected]
John SmithCarlos Pérez
María de Luna, s/n
María de Luna, s/n
María de Luna, s/n
Operations in a Relational DatabaseTables can be related one another
RDBMSs provide functionality for relating tables
Operations within a table:Insert a record (row) Delete a recordUpdate a recordQuery for specific records that satisfy a
condition
Table Example: Student info at unizar
Student PIN
Student Name
AddressEmail
Address
456913541131221023
Rafael Tolosana [email protected]
John SmithCarlos Pérez
María de Luna, s/n
María de Luna, s/n
María de Luna, s/n
