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Quiz: Fundamentos de BD y SQL

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Quiz: Fundamentos de BD y SQL

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Verdadero o falso sobre fundamentos de BD

Created by

Jose Rafael Alifonso Camacho
Jose Rafael Alifonso Camacho
Dominican Republic

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Quiz: Fundamentos de BD y SQL
 

Quiz: Fundamentos de BD y SQLOnline version

Verdadero o falso sobre fundamentos de BD

by Jose Rafael Alifonso Camacho
1

FOREIGN KEY establece una relación entre dos tablas y aplica integridad referencial.

2

ALTER TABLE puede añadir, modificar y eliminar columnas según necesidades.

3

DQL y DDL son lo mismo.

4

WHERE puede usarse para agregar nuevas filas.

5

NOT NULL evita que se inserten valores nulos en la columna.

6

La diferencia entre álgebra relacional y SQL radica en que SQL es un lenguaje de consulta declarativo y el álgebra relacional son operadores formales.

7

DROP TABLE no puede eliminar una tabla si tiene dependencias.

8

JOIN solo es aplicable si las tablas tienen la misma cantidad de columnas.

9

La clave candidata identifica de forma única cada registro dentro de una tabla.

10

UNIQUE garantiza que una columna no tenga valores duplicados incluyendo NULLs.

 
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