
100/600 parte 5-6
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Instructional Technology
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University
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Practice Problem
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Easy
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
el conjunto de ideas lógicas utilizadas para representar la estructura de las bases de datos, sele conoce como:
modelo relacional
modelo de base de datos
diagrama entidad relación
objeto concreto o abstracto que figura en una base de datos
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
la herramienta mas utilizadas para diseñar una base de datos es:
modelo relacional
diagrama de entidad relación
modelo de base de datos
objeto concreto o abstracto que figura en una base de datos
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál de las siguientes no es una función de agregación?
AVG()
SUM()
LIMIT()
MIN()
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué instrucción se emplea para eliminar todo el contenido de una tabla, pero conservado la tabla?
DELETE TABLE
DROP TABLE
TRUNCA TABLE
ERASE TABLE
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿una sentencia SELECT sin la cláusula WHERE devuelve?
todos los registros en la tabla que no estén relacionados con otra tabla
todos los registros existentes en la tabla
no se puede ejecutar una sentencia SELECT sin la cláusula WHERE
todos los campos de un registro de la tabla
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cómo se borra toda una base de dato con SQL?
DELETE DATABASE
ERASE DATABASE
DROP DATABASE
TRUNCATE DATABASE
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
en SQL para ordenar los datos devueltos por una sentencia SELECT se emplea la cláusula:
ORDEY BY
ORDERED BY
SORT BY
SORTED BY
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