
PostgreSQL Introducción
Quiz
•
Information Technology (IT)
•
Professional Development
•
Practice Problem
•
Medium
everto farias
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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué es una base de datos relacional?
Un sistema de archivos organizado por carpetas
Un conjunto de tablas relacionadas entre sí mediante claves
Una colección de documentos en formato JSON
Un sistema de almacenamiento en la nube
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué sentencia SQL se utiliza para recuperar datos de una tabla?
GET
OBTAIN
SELETC
SELECT
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La sentencia INSERT en SQL se utiliza para:
MODIFICAR REGISTROS
ACTUALIZAR REGISTROS
INSERTAR REGISTROS
ELIMINAR REGISTROS
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué hace la sentencia UPDATE en SQL?
Actualiza la estructura de la tabla
Modifica los valores de registros existentes
Actualiza la versión de SQL del servidor
Crea índices actualizados
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La sentencia DELETE en SQL
Elimina registros de una tabla
Elimina solo la estructura de la tabla
Elimina únicamente los índices
Desactiva temporalmente una tabla
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué función cumple la sentencia DROP en SQL?
Reduce el tamaño de la base de datos
Elimina completamente un objeto de la base de datos (tabla, vista, etc.)
Desplaza registros a una tabla temporal
Baja la prioridad de una consulta
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La cláusula LIMIT en SQL se utiliza para:
Limitar el acceso a ciertos usuarios
Restringir el número de filas devueltas en una consulta
Limitar el número de tablas en una base de datos
Establecer un límite de memoria para la consulta
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