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Quiz: Bases de datos relacionales

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Quiz: Bases de datos relacionales

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About this activity

¿Qué sabes sobre bases de datos relacionales?

Created by

HIRAM ALVAREZ VELAZQUEZ
HIRAM ALVAREZ VELAZQUEZ
Mexico

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Quiz: Bases de datos relacionales
 

Quiz: Bases de datos relacionalesOnline version

¿Qué sabes sobre bases de datos relacionales?

by HIRAM ALVAREZ VELAZQUEZ
1

El lenguaje SQL fue diseñado solo para consultas de selección y no para modificar datos.

2

Las llaves foráneas permiten establecer relaciones entre tablas.

3

Las bases de datos relacionales organizan datos en tablas con filas y columnas.

4

Una clave primaria puede contener valores nulos.

5

En una base de datos relacional, una columna puede almacenar listas de valores (por ejemplo, '1,2,3') en una misma celda.

6

La normalización reduce la redundancia de datos.

7

La normalización nunca afecta el rendimiento de las consultas.

8

Las llaves primarias identifican de forma única cada fila de una tabla.

9

Las llaves foráneas deben ser únicas en la tabla hija.

10

Las consultas SQL permiten leer y manipular datos en tablas.

 
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