
BD TEMA 2
Authored by Francisco Clavijo
Computers
Professional Development
Used 37+ times

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50 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué tipo de restricciones incluye automáticamente una PRIMARY KEY al ser definida en una columna?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En SQL, si NO se define un índice para una columna, pero esta es PRIMARY KEY, ¿qué ocurre?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la restricción que puede aplicarse SOLO a nivel de tabla en SQL?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si una columna es UNIQUE pero permite NULL, ¿qué ocurre cuando dos registros tienen el valor NULL?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cuál es la diferencia principal entre un índice y una vista en una base de datos?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cual de las siguientes restricciones genera un índice automáticamente?
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cómo afecta la eliminación de un índice?
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