
SQL
Authored by agustin kenny
Computers
Professional Development
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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Si uso una función de agregación, ¿Es obligatorio usar GROUP BY?
Verdadero
Falso
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quiero hacer una consulta que me devuelva el nombre, apellido y edad de Persona. Ademas, quiero que la consulta me de solo aquellas personas cuyo apellido es 'Gomez'. Por último, deseo que en la respuesta el titulo sea n para nombre, a para apellido y e para edad.
SELECT nombre as n, apellido as a, edad as e FROM Persona WHERE a = 'Gomez';
SELECT nombre, apellido, edad FROM Persona WHERE apellido = 'Gomez';
SELECT nombre, apellido, edad FROM Persona;
SELECT * FROM Persona WHERE apellido = 'Gomez';
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Es obligatorio escribir nuestras consultas con mayúscula
Verdade
Falso
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
A la clausula 'WHERE' le puedo agregar multiples condiciones
Verdadero
Falso
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quiero crear la tabla 'Persona' que tenga un atributo 'nombre'. Ademas, quiero que no se repitan los nombres. De las opciones provistas, ¿Cuál es la opción correcta?
CREATE TABLE Persona (id serial PRIMARY KEY, nombre VARCHAR(255) UNIQUE);
CREATE TABLE Persona (id serial PRIMARY KEY, nombre INTEGER UNIQUE);
CREATE TABLE Persona (id serial PRIMARY KEY, nombre VARCHAR(255) UNIQUE)
CREATE TABLE Persona (id serial PRIMARY KEY, nombre VARCHAR(255) NOT NULL);
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
SQL es
un dbms
un lenguaje
un paradigma
una base de datos
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Si quiero actualizar una tabla uso ...
SELECT
CREATE
AS
UPDATE
WHERE
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