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Desafío SQL: Ordena, Agrupa y Une

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Desafío SQL: Ordena, Agrupa y Une

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About this activity

Quiz: ORDER BY, GROUP BY, HAVING y JOIN

Created by

yovanny Castillo
yovanny Castillo
Dominican Republic

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Desafío SQL: Ordena, Agrupa y Une
 

Desafío SQL: Ordena, Agrupa y UneOnline version

Quiz: ORDER BY, GROUP BY, HAVING y JOIN

by yovanny Castillo
1

JOIN siempre devuelve todas las filas de las dos tablas.

2

JOIN puede ser INNER, LEFT, RIGHT o FULL según el comportamiento de combinación.

3

UN INNER JOIN es equivalente a un CROSS JOIN.

4

HAVING filtra grupos después de aplicar GROUP BY.

5

GROUP BY elimina filas duplicadas automáticamente.

6

ORDER BY se usa para ordenar el resultado de una consulta.

7

HAVING se aplica antes de GROUP BY.

8

GROUP BY agrupa filas que comparten el mismo valor en una columna.

9

ORDER BY puede aplicarse sin indicar columnas.

10

Un INNER JOIN devuelve filas cuando hay coincidencias en ambas tablas.

 
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