Question

我试图清理SQL Server中的一些Active Directory数据。我已设法将原始LFD文件读入表中。现在我需要清理一些值，这些属性的值分散在多行上。我可以通过具有前导空格的事实来识别需要附加到先前记录的记录。

示例：

ID        Record                     IsPartOfPrior
3114      memberOf:                        0
3115       CN=Sharepoint-Members-home      1
3116      memberOf:                        0
3117       This is                         1
3118       part of the                     1
3119       next line.                      1

最后，我想生成下表：

ID          Record
3114        memberOf:CN=Sharepoint-Members-home
3116        memberOf:This is part of the next line

我可以通过游标，设置变量，使用临时表和填充表来编写它。但是必须有一套基于（可能是递归？）的方法吗？

我可以使用STUFF方法将各行组合在一起，但是我如何将各种组合在一起呢？我认为我首先必须为每条记录定义groupID，然后按groupID将它们组合在一起？

感谢您的帮助。

Answer 1

批评，下面有评论。应该从 SQL Server 2008 开始。

--Here I emulate your table
DECLARE @yourtable TABLE (ID int, Record nvarchar(max), IsPartOfPrior bit)

INSERT INTO @yourtable VALUES                   
(3114,'memberOf:',0),(3115,'CN=Sharepoint-Members-home',1),(3116,'memberOf:',0),(3117,'This is',1),(3118,'part of the',1),(3119,'next line.',1)

--Getting max ID
DECLARE @max_id int 

SELECT @max_id = MAX(ID)+1
FROM @yourtable

--We get next prior for each prior record
--And use STUFF and FOR XML PATH to build new Record
SELECT  y.ID,
        y.Record + b.Record as Record
FROM @yourtable y
OUTER APPLY (
        SELECT TOP 1 ID as NextPrior
        FROM @yourtable 
        WHERE IsPartOfPrior = 0 and y.ID < ID
        ORDER BY ID ASC
    ) as t
OUTER APPLY (
    SELECT STUFF((
        SELECT ' '+Record
        FROM @yourtable
        WHERE ID > y.ID and ID < ISNULL(t.NextPrior,@max_id)
        ORDER BY id ASC
        FOR XML PATH('')
            ),1,1,'') as Record
) as b
WHERE y.IsPartOfPrior = 0

输出：

ID          Record
----------- -----------------------------------------
3114        memberOf:CN=Sharepoint-Members-home
3116        memberOf:This is part of the next line.

如果ID是数字和升序，这将有效。

Answer 2

另一个选项如果2012 +

示例

Declare @YourTable Table ([ID] int,[Record] varchar(50),[IsPartOfPrior] int) Insert Into @YourTable Values (3114,'memberOf:',0) ,(3115,'CN=Sharepoint-Members-home',1) ,(3116,'memberOf:',0) ,(3117,'This is',1) ,(3118,'part of the',1) ,(3119,'next line.',1) ;with cte as ( Select *,Grp = sum(IIF([IsPartOfPrior]=0,1,0)) over (Order By ID) From @YourTable ) Select ID ,Record = Stuff((Select ' ' +Record From cte Where Grp=A.Grp Order by ID For XML Path ('')),1,1,'') From (Select Grp,ID=min(ID)from cte Group By Grp ) A

<强>返回

ID Record 3114 memberOf: CN=Sharepoint-Members-home 3116 memberOf: This is part of the next line.

如果它有助于可视化，则cte生成：

ID Record IsPartOfPrior Grp << Notice Grp Values 3114 memberOf: 0 1 3115 CN=Sharepoint-Members-home 1 1 3116 memberOf: 0 2 3117 This is 1 2 3118 part of the 1 2 3119 next line. 1 2

T-SQL：清理数据，将行合并到列中

2 个答案: