
Quiz sobre el lenguaje SQL
Authored by Oscar Barnett
Information Technology (IT)
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es el lenguaje estándar de definición, manipulación y control de bases de datos relacionales?
MySQL
PL/SQL
SQL
T-SQL
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué sentencia se utiliza para crear una tabla en SQL?
DROP TABLE
CREATE TABLE
ADD TABLE
INSERT TABLE
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué tipo de dato se utilizaría para almacenar una fecha en SQL?
FLOAT
INTEGER
DATE
CHAR
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál de las siguientes restricciones asegura que una columna no puede tener valores nulos?
FOREIGN KEY
NOT NULL
PRIMARY KEY
UNIQUE
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué sentencia se utiliza para modificar los valores de algunas filas en una tabla?
DELETE
INSERT
SELECT
UPDATE
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la función de la cláusula SELECT en SQL?
Actualizar datos en una tabla
Crear una nueva tabla
Seleccionar columnas de una tabla
Eliminar registros de una tabla
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué predicado se utiliza para comprobar si un valor es nulo en SQL?
BETWEEN
IS NULL
EXISTS
IS NOT NULL
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