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Quiz SQL: Bases de datos (Medio)

Froggy Jumps

Played 30

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Quiz de SQL de nivel medio

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Mexico

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Quiz SQL: Bases de datos (Medio)
 

Froggy Jumps

Quiz SQL: Bases de datos (Medio)Online version

Quiz de SQL de nivel medio

by Jesus tadeo Alcantara
1

¿Qué sentencia se usa para seleccionar datos de una o varias tablas?

2

¿Qué cláusula se utiliza para filtrar filas?

3

¿Cómo se obtiene filas únicas sin duplicados?

4

¿Qué tipo de JOIN devuelve todas las filas de la tabla izquierda y las coincidencias de la derecha?

5

¿Qué cláusula agrupa filas para funciones agregadas?

6

¿Qué cláusula se usa para filtrar grupos tras GROUP BY?

7

¿Qué propiedad de las bases de datos garantiza transacciones atómicas, consistentes, aisladas y duraderas?

8

¿Qué se usa para crear índices para acelerar consultas?

9

¿Qué tipo de restricción evita valores nulos?

10

¿Qué declaración modifica la estructura de una tabla existente?

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