
Quiz sobre JOIN en SQL
Quiz
•
Computers
•
Professional Development
•
Practice Problem
•
Medium
Gilda Orellana
Used 1+ times
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la cláusula utilizada para crear un JOIN de igualdad entre dos tablas?
JOIN
WHERE
ORDER BY
GROUP BY
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué tipo de JOIN se utiliza para combinar filas de dos o más tablas basándose en una relación entre ellas?
CROSS JOIN
FULL JOIN
INNER JOIN
LEFT JOIN
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la sintaxis correcta para un INNER JOIN?
SELECT * FROM tabla1 JOIN tabla2
SELECT * FROM tabla1 INNER JOIN tabla2 ON (condición)
SELECT * FROM tabla1 USING (columna)
SELECT * FROM tabla1 NATURAL JOIN tabla2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué cláusula se utiliza para agregar condiciones adicionales a un JOIN?
GROUP BY
ORDER BY
WHERE
HAVING
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la función de la cláusula USING en un JOIN?
Agrupar los resultados
Ordenar los resultados
Filtrar los resultados
Especificar columnas para la comparación
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué se debe hacer para calificar columnas en un JOIN?
Usar alias
Eliminar columnas duplicadas
Usar la cláusula WHERE
Usar la cláusula GROUP BY
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es el propósito de la cláusula ON en un JOIN?
Especificar la relación entre tablas
Definir condiciones de filtrado
Agrupar resultados
Ordenar resultados
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué se utiliza para contar el número de empleados en un departamento en una consulta JOIN?
COUNT
SUM
AVG
MAX
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