
Lenguaje SQL
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Computers
Professional Development
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16 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Cual es la función que nos permite obtener de una cadena, una subcadena?
INSTR
LPAD
SUBSTR
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué función de la SELECT nos permite concatenar?
CONCAT
UNIR
CONCATENAR
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué hace la función DECODE?
Mostrar diferentes resultados según un determinado valor
No hace nada especial, siempre saca el mismo valor
Quitar espacios en blanco
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Con qué clausula se obtienen los datos ordenados en una SELECT?
Con DESC
con ORDER BY
Con ASC
No hace falta poner nada, sale ordenado
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Que hace MONTHS_BETWEEN?
Añade meses
Devuelve número de meses entre dos fechas
Calcula el número de meses
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué hace la función GREATEST?
Devuelve en una lista la mayor de las fechas
Devuelve en una lista la menor de las fechas
Extrae un valor de fecha concreta
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué hace la función EXTRACT?
Devuelve la fecha menor
Solo permite extraer el día
Extrae un valor de una fecha concreta(day, month, year)
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