标记，如果列中的连续行在SQL Server

Question

ID  Flag
1000    0
1000    1
1000    1
1000    1
1000    1
1000    0
2000    0
2000    1
2000    0
2000    1
2000    0

我想添加一个标记ID的列，如果它们在SQL Server的“Flag”列中至少有3个连续的“1”。

Answer 1

这可能会有所帮助。它看起来与您的要求类似，可能会让您走上正轨。 Find records with 3 or more consecutive records with same value

所以类似的东西可能

CREATE TABLE Table1 (
id int,
flag bit)

INSERT into Table1 (id,flag)
VALUES (1000,0),(1000,1),(1000,1),(1000,1)


SELECT t.*
FROM (SELECT t.*, count(*) over (partition by ID) as cnt
  FROM (SELECT table1.*,
               (row_number() over (partition by id order by flag) 

               ) as grp
        from table1
       ) t
  WHERE flag = 1
 ) t
WHERE cnt >= 3;