Imagem de fundo

Observe o resultado de uma consulta mostrado a seguir.                                 ...

Observe o resultado de uma consulta mostrado a seguir.

                                 

O comando SQL que NÃO produz o resultado acima é:

A

select x.*

from x

where not exists (select * from z where z.a=x.a)

union all

select y.*

from y

where not exists (select * from z where z.c=y.c)

B

select 6 a, 3 b

union

select y.*

from y

where not exists (select * from z where z.c=y.c)

C

select x.*

from x

where not exists (select * from z where z.a=x.a)

D

select x.*

from x

where not exists (select * from z where z.a=x.a)

union select 6,3

E

select x.*

from x

where not exists (select * from z where z.a=x.a)

union all

select 6,3