
Llaves Primarias y Foraneas
Quiz
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others
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Professional Development
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Practice Problem
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Medium
P Sánchez
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La función que tiene la cardinalidad máxima en las bases de datos, es permitir al diseñador de base de datos conocer dónde va la clave foránea.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Una llave primaria (en inglés Primary Key o PK), es uno o muchos campos de una tabla (o relación), que hacen a una tupla (renglón) no sea única y que se pueda repetir
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
TODAS LAS TABLAS DEBEN TENER LLAVES PRIMARIAS.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En la cardinalidad 1:1, al hacer la relación en las entidades no hay llaves foraneas.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Las LLAVES FORÁNEAS son las que relacionan las tablas.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Los campos que se ocupen como llaves foráneas, nunca deben ser llaves primarias de una tabla.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La regla de cardinalidad uno a uno (1:1) indica que: “Una entidad de un tipo, puede estar relacionada ÚNICAMENTE con una entidad de otro tipo”.
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