find threads where I and Jian participated but not Dave

[Xu Wang]

ooo that is nice also. I will look into that. I think it is a good
approach. Kind regards to everyone! Xu

On Tue, Jun 13, 2017 at 7:31 PM, David Bremner <david at tethera.net> wrote:
> Xu Wang <xuwang762 at gmail.com> writes:
>
>> I bump this. Actually more simple than that, how to search for thread
>> in which I have participated and Jian has participated? Excluding
>> threads in which Dave participated is perhaps more complicated.
>
> I don't know of an efficient way to do this. You could write a script
> something like
>
> notmuch search --output=threads from:Xu  > A
> notmuch search --output=threads from:Jian  > B
> comm -12 A B
>
> I think the output is sorted, but you might also have to sort A and B
>