Kexi/Handbook/Introduction to Databases/Database Design/da: Difference between revisions

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=== Design af databaser ===
=== Design af databaser ===


Database design needs careful planning. Note that '''''Contacts''''' table redesign proposed in section [[Special:MyLanguage/Kexi/Handbook/Introduction_to_Databases/Database_and_Spreadsheet#Data_integrity_and_validity|Data integrity and validity]] can generate problems when the table is filled with data. For example, renaming a field is a simple task, but splitting the '''''Address''''' field into separate fields requires careful and tedious work.
Design af databaser kræver omhyggelig planlægning. Bemærk, at den ændring af deignet af tabellen '''''Personer''''', som blev foreslået i afsnittet [[Special:MyLanguage/Kexi/Handbook/Introduction_to_Databases/Database_and_Spreadsheet#Data_integrity_and_validity|Dataintegritet og gyldighed]] kan give problemer, hvis tabellen er fyldt med data. For eksempel er det en simpel opgave at omdøbe et felt, men at opdele feltet '''''Adresse''''' i adskilte felter kræver omhyggeligt og trælsomt arbejde.


To avoid such situations, rethink your database project before you create it in your computer, and before you and others will start to use it. Thus, by investing some time initially, you will most probably save your time on everyday use.
To avoid such situations, rethink your database project before you create it in your computer, and before you and others will start to use it. Thus, by investing some time initially, you will most probably save your time on everyday use.

Revision as of 09:58, 13 August 2012

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Design af databaser

Design af databaser kræver omhyggelig planlægning. Bemærk, at den ændring af deignet af tabellen Personer, som blev foreslået i afsnittet Dataintegritet og gyldighed kan give problemer, hvis tabellen er fyldt med data. For eksempel er det en simpel opgave at omdøbe et felt, men at opdele feltet Adresse i adskilte felter kræver omhyggeligt og trælsomt arbejde.

To avoid such situations, rethink your database project before you create it in your computer, and before you and others will start to use it. Thus, by investing some time initially, you will most probably save your time on everyday use.