
TEMA 9 - BASE DE DATOS
Authored by Sara Poveda
Computers
Professional Development
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué sentencia nos permite seleccionar los datos que nos interesen de una tabla?
FROM
SELECT
WHERE
GROUP BY
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué clausula va ligada siempre a SELECT?
FROM
HAVING
GROUP BY
Todas son correctas
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Para indicar el orden que deben seguir los elementos seleccionados de una tabla lo podemos hacer:
índice indicado en ORDER BY
Nombre de la columna indicado en ORDER BY
Nombre de la columna e índice indicado en ORDER BY
Todas son correctas
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Con las Cláusula ORDER BY solo podemos ordenar los tipos de datos:
carácter y número
todos los tipos de datos
carácter, número y fecha
todas con correctas
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Para poder agrupar los datos en un campo determinando se utilizan las cláusulas:
GROUP BY o HAVING
WHERE
ORDER BY
FROM
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Para calcular el valor promedio de un campo se usa la función
SUM
COUNT
AVG
MAX
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
una herramienta que proporcionan los SGBD para manejar consultas repetitivitas en las que puede que varíe un único dato son las
variables de combinación
alias
variables de sustitución
se indican son el símbolo #
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