如何摆脱SQL Server查询中的排序规则冲突？ [英] How to get rid of collation conflict in a SQL Server query?

问题描述

我正在一个视图，其中我使用一个内部连接两个表来自两个不同的服务器。我们使用链接服务器。运行查询时收到此消息：

I am working on a view, wherein I am using an inner join on two tables which are from two different servers. We are using linked server. When running the query I am getting this message:

在等于操作中无法解决SQL_Latin1_General_CP1_CI_AS和Arabic_CI_AS之间的排序规则冲突。

Cannot resolve the collation conflict between "SQL_Latin1_General_CP1_CI_AS" and "Arabic_CI_AS" in the equal to operation.

我不太了解排序规则。通过互联网搜索我找到使用 COLLATE 的解决方案，但是 COLLATE 的概念对我并不清楚。它会改变任何数据库的任何东西吗？我正在寻找一个解决方案，而不改变任何数据库的任何东西。

I don't know much about collation. Searching through internet I find solutions to use COLLATE, but the concept of COLLATE is not clear to me. Will it change anything for any of the databases? I am looking for a solution without changing anything for the databases.

欢迎任何好的学习材料这些概念。

Any good learning material for these concepts is welcome.

推荐答案

您可以通过强制查询中使用的归类为特定归类来解决问题，例如 SQL_Latin1_General_CP1_CI_AS 或 DATABASE_DEFAULT 。例如：

You can resolve the issue by forcing the collation used in a query to be a particular collation, e.g. SQL_Latin1_General_CP1_CI_AS or DATABASE_DEFAULT. For example:

SELECT MyColumn
FROM FirstTable a
INNER JOIN SecondTable b
ON a.MyID COLLATE SQL_Latin1_General_CP1_CI_AS = 
b.YourID COLLATE SQL_Latin1_General_CP1_CI_AS

在上述查询中， MyID和b.YourID是具有基于文本的数据类型的列。使用 COLLATE 将强制查询忽略数据库上的默认排序规则，而是使用提供的排序规则，在这种情况下 SQL_Latin1_General_CP1_CI_AS 。

In the above query, a.MyID and b.YourID would be columns with a text-based data type. Using COLLATE will force the query to ignore the default collation on the database and instead use the provided collation, in this case SQL_Latin1_General_CP1_CI_AS.

基本上这里发生的是每个数据库都有自己的排序规则，为您的数据提供排序规则，大小写和重音敏感性属性 href =http://technet.microsoft.com/en-us/library/ms143726.aspx> http://technet.microsoft.com/en-us/library/ms143726.aspx ）并应用于包含文本数据类型的列，例如 VARCHAR ， CHAR ， NVARCHAR 具有不同的排序规则，则不能使用等于（=）的运算符比较文本列，而不解决两个不同排序规则之间的冲突。

Basically what's going on here is that each database has its own collation which "provides sorting rules, case, and accent sensitivity properties for your data" (from http://technet.microsoft.com/en-us/library/ms143726.aspx) and applies to columns with textual data types, e.g. VARCHAR, CHAR, NVARCHAR, etc. When two databases have differing collations, you cannot compare text columns with an operator like equals (=) without addressing the conflict between the two disparate collations.

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