This command is equal to SDIFF, but instead of returning the resulting set, it
is stored in destination.
If destination already exists, it is overwritten.
Return value
Integer reply: the number of elements in the resulting set.
This command is equal to SDIFF, but instead of returning the resulting set, it
is stored in destination.
If destination already exists, it is overwritten.
Integer reply: the number of elements in the resulting set.