SELECT

Quiz
•
Other
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Professional Development
•
Medium
Christian Grunblatt
Used 2+ times
FREE Resource
8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
La sentencia Select sirve para:
Insertar registros
Modificar registros
Obtener registros
Borrar registros
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
La sentencia Distinct se usa para:
No éxiste
Seleccionar registros repetidos
Eliminar registros repetidos al obtener el resultado
Eliminar de la tabla registros repetidos
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
"And" es un operador lógico que sirve para sumar 2 números.
Verdadero
Falso
Verdadero solo si los números son campos de texto
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
El operador aritmético para multiplicar dos valores numericos es: "X"
Verdadero
Falso
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La siguiente sintaxis que problema presenta?
Select * from Clientes where N_Cliente between 200 and 300
No se puede usar * de la consulta tiene un Where
El operador Between debería ir delante del campo N_Cliente
No presenta ningún problema
Los valores de números van con comilas simples.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La sentencia:
SELECT Sexo, COUNT(N_Cliente) as Cant_Clientes
FROM CLIENTES GROUP BY Sexo
Devuelve:
Los campos Sexo y N_Cliente de todos los registros
Devuelve solo los clientes que tengan el campo Sexo distinto de NULL
Devuelve la cantidad de clientes de cada sexo
Da error
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La sentencia:
SELECT Sexo, COUNT(N_Cliente) as Cant_Clientes
FROM CLIENTES
GROUP BY Sexo
HAVING COUNT(N_Cliente)> 3
Devuelve:
Devuelve la cantidad de clientes del sexo que tenga más de 3 clientes
Devuelve todos los registros de la tabla
Filtra los N_Cliente mayores a 3
Agrupa los resultados por el campo N_Cliente
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Las sentencias Group by y Having se pueden escribir:
Primero el Having y después el Group by
Siempre primero el Group by y después el Having
El orden no afecta el resultado
No se pueden escribir juntas en la misma sentencia
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