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Diseño de Datos del Sistema

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Diseño de Datos del Sistema

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About this activity

Conceptos clave de bases de datos.

Created by

Ana Velázquez
Ana Velázquez
Mexico

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Diseño de Datos del Sistema
 

Diseño de Datos del SistemaOnline version

Conceptos clave de bases de datos.

by Ana Velázquez
1

El objetivo es reducir la redundancia, garantizar integridad y mejorar el rendimiento.

2

El objetivo es aumentar la duplicación de datos para flexibilidad.

3

El diseño de datos del sistema se realiza directamente en el código fuente sin modelo conceptual.

4

El diseño de datos del sistema convierte requerimientos empresariales en estructura técnica con tablas y relaciones.

5

El contenedor de la base de datos se crea después de definir índices (los índices se crean para optimizar búsquedas ya).

6

Las bases de datos no requieren llaves foráneas para relacionar tablas.

7

Una consulta típica es DELETE para recuperar información (debería ser SELECT).

8

Las llaves primarias identifican de forma única cada fila.

9

Las tablas se componen de filas y columnas.

10

El lenguaje de manipulación principal es SQL para insertar, actualizar y eliminar datos.

 
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