SQL Server - Jumlah Kumulatif yang direset ketika 0 ditemui

Di SQL Server 2008, Anda sangat terbatas karena Anda tidak dapat menggunakan fungsi analitik. Berikut ini tidak efisien, tetapi ini akan menyelesaikan masalah Anda:

with tg as (
      select t.*, g.grp
      from t cross apply
           (select count(*) as grp
            from t t2
            where t2.pk <= t.pk and t2.pk = 0
           ) g
     )
select tg.*, p.running_price
from tg cross apply
     (select sum(tg2.price) as running_price
      from tg tg2
      where tg2.grp = tg.grp and tg2.pk <= tg.pk
     ) p;

Sayangnya, sebelum SQL Server 2012, solusi paling efisien mungkin melibatkan kursor. Di SQL Server 2012+, Anda cukup melakukan:

select t.*,
       sum(price) over (partition by grp order by pk) as running_price
from (select t.*,
             sum(case when price = 0 then 1 else 0 end) over (order by pk) as grp
      from t
     ) t;