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CREATE TABLE table_ ( User_ID varchar(40), Month date, Active integer); INSERT INTO table_ (User_ID, Month, Active) VALUES ('11M8CIG5','2021-12-01',1), ('11M8CIG5','2022-01-01',0), ('11M8CIG5','2022-02-01',1), ('11M8CIG5','2022-03-01',1), ('11M8CIG5','2022-04-01',1), ('11M8CIG5','2022-05-01',0), ('11M8CIG5','2022-06-01',1), ('11M8CIG5','2022-07-01',1), ('11M8CIG5','2022-08-01',0), ('11M8CIG5','2022-09-01',1); select User_ID, month, active, row_number() over(partition by User_ID, X order by month)-1 D from ( select User_ID, month, active, count(case when active != 1 then 1 end) over(partition by User_ID order by month) X from table_ ) Q
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