SQL将多行合并为一行

我目前正在编写一个SQL脚本-包含一个业务术语和所有相关的同义词。它所做的是创建多行，因为有多个同义词也可以有多个值的其他列

我试图做的是为每个业务术语创建一行，并连接值，以分隔，这样我只为每个业务术语获得一个行项目

当前我的SQL脚本是：

SELECT dbo.TblBusinessTerm.BusinessTerm, dbo.TblBusinessTerm.BusinessTermLongDesc, 
       dbo.TblBusinessTerm.DomainCatID, dbo.TblSystem.SystemName, 
       dbo.TblDomainCat.DataSteward, dbo.TblDomainCat.DomainCatName, 
       dbo.TblField.GoldenSource, dbo.TblField.GTS_table, 
       dbo.TblTableOwner.TableOwnerName, dbo.TblBusinessSynonym.Synonym 
FROM   dbo.TblTableOwner INNER JOIN
       dbo.TblBusinessTerm INNER JOIN
       dbo.TblBusinessSynonym ON dbo.TblBusinessTerm.BusinessTermID = dbo.TblBusinessSynonym.BusinessTermID INNER JOIN
       dbo.TblField ON dbo.TblBusinessTerm.BusinessTermID = dbo.TblField.BusinessTermID INNER JOIN
       dbo.TblSystem INNER JOIN
       dbo.TblTable ON dbo.TblSystem.SystemID = dbo.TblTable.SystemID ON dbo.TblField.TableID = dbo.TblTable.TableID INNER JOIN
       dbo.TblDomainCat ON dbo.TblBusinessTerm.DomainCatID = dbo.TblDomainCat.DomainCatID ON dbo.TblTableOwner.TableOwnerID = dbo.TblDomainCat.DataSteward

是否有一种简单的方法可以做到这一点，并将性能考虑在内-我是SQL新手

多谢各位

我已成功创建了with语句，该语句现在连接了我的行：

With syn as (
    select [BusinessTermID],
           syns = STUFF((SELECT  ', ' + dbo.TblBusinessSynonym.Synonym
                         FROM   dbo.TblBusinessSynonym
                         WHERE  [BusinessTermID] = x.[BusinessTermID]
                             AND    dbo.TblBusinessSynonym.Synonym <> ''
                         FOR XML PATH ('')),1,2,'')
    FROM dbo.TblBusinessSynonym AS x
    GROUP BY [BusinessTermID]
)
select * from syn

但是现在我如何在上面的查询中使用它呢

将要用syn的结果替换dbo.TblBusinessSynonym.Synonym

---

任何能够提供帮助的SQL 2014开发人员？

请使用STRING\u AGG函数。它将字段中的记录项组合在一起，并将它们设置在一个用指定分隔符分隔的记录中

详情如下:

---

您的查询很复杂，因此我将在这里发布示例数据以及如何以您想要的方式处理它。操作是字符串聚合和连接，在最新版本中有一个string_agg函数，它为我们完成了这项工作。但是，由于无法使用此功能，这里有一个解决方法：

select * into #tt
from (values (1, '1'),(1, '2'),(2, '1'),(2, '2')) A(id, someStr) 

select id, (select someStr + ',' from #tt where id = [t].id for xml path('')) [grouped]
from #tt [t] group by id

上面的查询按Id分组，并在someStr列中包含所有相应的行。

在最顶端编写with语句，不使用select。 然后按原样编写上层查询并进行更改

INNER JOIN dbo.TblBusinessSynonym ON dbo.TblBusinessTerm.BusinessTermID = dbo.TblBusinessSynonym.BusinessTermID

到

就这样

With syn as (
    select [BusinessTermID],
           syns = STUFF((SELECT  ', ' + dbo.TblBusinessSynonym.Synonym
                         FROM   dbo.TblBusinessSynonym
                         WHERE  [BusinessTermID] = x.[BusinessTermID]
                             AND    dbo.TblBusinessSynonym.Synonym <> ''
                         FOR XML PATH ('')),1,2,'')
    FROM dbo.TblBusinessSynonym AS x
    GROUP BY [BusinessTermID]
)

SELECT dbo.TblBusinessTerm.BusinessTerm, 
       dbo.TblBusinessTerm.BusinessTermLongDesc, 
       dbo.TblBusinessTerm.DomainCatID, dbo.TblSystem.SystemName, 
       dbo.TblDomainCat.DataSteward, dbo.TblDomainCat.DomainCatName, 
       dbo.TblField.GoldenSource, dbo.TblField.GTS_table, 
       dbo.TblTableOwner.TableOwnerName, syn.syns 
FROM   dbo.TblTableOwner INNER JOIN
       dbo.TblBusinessTerm INNER JOIN
       syn ON dbo.TblBusinessTerm.BusinessTermID = syn.BusinessTermID INNER JOIN
       dbo.TblField ON dbo.TblBusinessTerm.BusinessTermID = dbo.TblField.BusinessTermID INNER JOIN
       dbo.TblSystem INNER JOIN
       dbo.TblTable ON dbo.TblSystem.SystemID = dbo.TblTable.SystemID ON   dbo.TblField.TableID = dbo.TblTable.TableID INNER JOIN
       dbo.TblDomainCat ON dbo.TblBusinessTerm.DomainCatID = dbo.TblDomainCat.DomainCatID ON dbo.TblTableOwner.TableOwnerID = dbo.TblDomainCat.DataSteward

---

可能的重复可能需要使用CONCAT_WS表示分隔值，或使用CONCAT表示常规值。无法识别STRING_AGG。在MSSQL 2016之前不支持此函数。这里是这样的约定-查询很简单，我有过复杂，但是，我无法将表连接等方面的内容与我的内容相关联，因为这些内容仅在SQL server中开始，所以仍在尝试解决方法。我已设法运行脚本-谢谢-但现在SYNS根本不显示为列标题。已重新发布ammeded代码我已添加完整查询。。。在syn中使用左连接可能是查询中更好的方式谢谢。仍然不喜欢类似的dbo.TblTableOwner.TableOwnerName，syn.syns有一个问题syn.sys-说不能使用多部分标识符syn.syns上是否有输入错误？它应该是syn.synsNo类型，在dbo.TblBusinessTerm.BusinessTermID=syn.BusinessTermID上的dbo.syn上也有问题-表示dbo.syn-对象名称无效。它似乎并没有在with语句中提取SYN并将其传递到查询的其余部分

With syn as (
    select [BusinessTermID],
           syns = STUFF((SELECT  ', ' + dbo.TblBusinessSynonym.Synonym
                         FROM   dbo.TblBusinessSynonym
                         WHERE  [BusinessTermID] = x.[BusinessTermID]
                             AND    dbo.TblBusinessSynonym.Synonym <> ''
                         FOR XML PATH ('')),1,2,'')
    FROM dbo.TblBusinessSynonym AS x
    GROUP BY [BusinessTermID]
)

SELECT dbo.TblBusinessTerm.BusinessTerm, 
       dbo.TblBusinessTerm.BusinessTermLongDesc, 
       dbo.TblBusinessTerm.DomainCatID, dbo.TblSystem.SystemName, 
       dbo.TblDomainCat.DataSteward, dbo.TblDomainCat.DomainCatName, 
       dbo.TblField.GoldenSource, dbo.TblField.GTS_table, 
       dbo.TblTableOwner.TableOwnerName, syn.syns 
FROM   dbo.TblTableOwner INNER JOIN
       dbo.TblBusinessTerm INNER JOIN
       syn ON dbo.TblBusinessTerm.BusinessTermID = syn.BusinessTermID INNER JOIN
       dbo.TblField ON dbo.TblBusinessTerm.BusinessTermID = dbo.TblField.BusinessTermID INNER JOIN
       dbo.TblSystem INNER JOIN
       dbo.TblTable ON dbo.TblSystem.SystemID = dbo.TblTable.SystemID ON   dbo.TblField.TableID = dbo.TblTable.TableID INNER JOIN
       dbo.TblDomainCat ON dbo.TblBusinessTerm.DomainCatID = dbo.TblDomainCat.DomainCatID ON dbo.TblTableOwner.TableOwnerID = dbo.TblDomainCat.DataSteward