Sql server SQL Server 2008 R2:行号（）

我有以下数据：

例如：

看起来像：

select * from vdata;

cola   colb
--------------
A       B
B       C
A       X
Z       L
N       M
O       P  
R       Z
X       Y
T       N
F       E
G       H

注意：现在我只想显示cola必须显示在colb中的数据，或者colb必须显示在cola中的数据，我想添加列以根据下一个记录中的值显示每个记录的行号

预期结果：

对上述结果的解释：第一行在开始时有行号1，并再次分配给下两个记录，因为columncola或colb中的任何一个都有值A或B。由于第四条记录没有任何值A或B，所以将第2行指定给第四条记录，并且该过程将以相同的方式继续。注意，记录7有X和Y，它的行号是1，因为它与表中第二个记录A和X相关

我的错误尝试：

---

表中需要某种id来建立顺序

create table #vdata
(
id int identity(1,1),
cola varchar(10),
colb varchar(10)
 );

insert into #vdata values('A','B'),('B','C'),('A','X'),('Z','L'),
('N','M'),('O','P'),('R','Z'),('X','Y'),('T','N'),('F','E'),('G','H');


WITH Roots AS (
    SELECT 1 AS level
         ,id
         ,id AS topid
         ,cola
         ,colb
    FROM #vdata
  UNION ALL
    SELECT level + 1 AS level
          ,#vdata.id
          ,Roots.topid
          ,#vdata.cola
          ,#vdata.colb
    FROM Roots
         INNER JOIN #vdata
             ON (#vdata.id > Roots.id)
                AND (#vdata.cola = Roots.cola
                     OR #vdata.cola = Roots.colb
                     OR #vdata.colb = Roots.cola
                     OR #vdata.colb = Roots.colb)
)
, MaxLevel AS (
    SELECT id 
          ,topid
          ,DENSE_RANK() OVER (ORDER BY topid) AS RowNumbers
          ,cola
          ,colb
    FROM Roots
    WHERE level = (SELECT MAX(level) FROM Roots AS InnerRoots WHERE InnerRoots.id = Roots.id)
)
SELECT RowNumbers
      ,cola
      ,colb
FROM MaxLevel
ORDER BY RowNumbers

---

表中需要某种id来建立顺序

create table #vdata
(
id int identity(1,1),
cola varchar(10),
colb varchar(10)
 );

insert into #vdata values('A','B'),('B','C'),('A','X'),('Z','L'),
('N','M'),('O','P'),('R','Z'),('X','Y'),('T','N'),('F','E'),('G','H');


WITH Roots AS (
    SELECT 1 AS level
         ,id
         ,id AS topid
         ,cola
         ,colb
    FROM #vdata
  UNION ALL
    SELECT level + 1 AS level
          ,#vdata.id
          ,Roots.topid
          ,#vdata.cola
          ,#vdata.colb
    FROM Roots
         INNER JOIN #vdata
             ON (#vdata.id > Roots.id)
                AND (#vdata.cola = Roots.cola
                     OR #vdata.cola = Roots.colb
                     OR #vdata.colb = Roots.cola
                     OR #vdata.colb = Roots.colb)
)
, MaxLevel AS (
    SELECT id 
          ,topid
          ,DENSE_RANK() OVER (ORDER BY topid) AS RowNumbers
          ,cola
          ,colb
    FROM Roots
    WHERE level = (SELECT MAX(level) FROM Roots AS InnerRoots WHERE InnerRoots.id = Roots.id)
)
SELECT RowNumbers
      ,cola
      ,colb
FROM MaxLevel
ORDER BY RowNumbers

另一种方式

create table #vdata
(
cola varchar(10),
colb varchar(10)
 );

insert into #vdata values('A','B'),('B','C'),('A','X'),('Z','L'),
('N','M'),('O','P'),('R','Z'),('X','Y'),('T','N'),('F','E'),('G','H');



with src as
(
    select row_number() over(order by cola, colb) id, cola, colb
    from #vdata
)
, [matched] as
(
    select s1.*
    , (select min(s2.id) from src s2 where (s1.cola = s2.cola or s1.colb = s2.cola or s1.cola = s2.colb or s1.colb = s2.colb)) id2
    from src s1
)
, [result] as
(
    select m1.*
    , (select m2.id2 from [matched] m2 where m2.id = m1.id2) [id3]
    from [matched] m1
)
select cola, colb, dense_rank() over(order by id3) [rank]
from [result]
order by id

另一种方式

create table #vdata
(
cola varchar(10),
colb varchar(10)
 );

insert into #vdata values('A','B'),('B','C'),('A','X'),('Z','L'),
('N','M'),('O','P'),('R','Z'),('X','Y'),('T','N'),('F','E'),('G','H');



with src as
(
    select row_number() over(order by cola, colb) id, cola, colb
    from #vdata
)
, [matched] as
(
    select s1.*
    , (select min(s2.id) from src s2 where (s1.cola = s2.cola or s1.colb = s2.cola or s1.cola = s2.colb or s1.colb = s2.colb)) id2
    from src s1
)
, [result] as
(
    select m1.*
    , (select m2.id2 from [matched] m2 where m2.id = m1.id2) [id3]
    from [matched] m1
)
select cola, colb, dense_rank() over(order by id3) [rank]
from [result]
order by id

---

如果可乐必须在colb中出现，那么为什么预期中会出现“A”output@Pradeep，请再读一遍这封信。现在我明白了。如果可乐必须在可乐中出现，那么你怎么会在预期中得到“A”output@Pradeep，请把纸条再读一遍。现在我明白了。。

create table #vdata
(
cola varchar(10),
colb varchar(10)
 );

insert into #vdata values('A','B'),('B','C'),('A','X'),('Z','L'),
('N','M'),('O','P'),('R','Z'),('X','Y'),('T','N'),('F','E'),('G','H');



with src as
(
    select row_number() over(order by cola, colb) id, cola, colb
    from #vdata
)
, [matched] as
(
    select s1.*
    , (select min(s2.id) from src s2 where (s1.cola = s2.cola or s1.colb = s2.cola or s1.cola = s2.colb or s1.colb = s2.colb)) id2
    from src s1
)
, [result] as
(
    select m1.*
    , (select m2.id2 from [matched] m2 where m2.id = m1.id2) [id3]
    from [matched] m1
)
select cola, colb, dense_rank() over(order by id3) [rank]
from [result]
order by id