SQL JOIN
Quiz
•
Computers
•
KG - University
•
Hard
Used 95+ times
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pasa este código a SQL 92
SELECT *
FROM alumnos
CROSS JOIN profesores
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué obtiene esta instrucción?
SELECT *
FROM alumnos
CROSS JOIN profesores
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En esta instrucción
SELECT a.nombre, p.nombre FROM alumnos a
LEFT OUTER JOIN profesores p
USING (COD_PROFESOR)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Observa esta instrucción
SELECT a.nombre, p.nombre, p.cod_profesor
FROM profesores p
JOIN alumnos a USING(cod_profesor)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿Qué significa SQL?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
SELECT p.dni, p.nombre, c.fecha,c.salario
FROM personas p
JOIN contratos c ON (C.DNI=P.DNI)
¿Cuál de estas instrucciones es equivalente?
FROM personas p
JOIN contratos c USING(dni)
FROM personas p,contratos
WHERE p.dni IS NOT NULL
FROM personas p,contratos
FROM personas p
JOIN contratos c USING(dni)
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