得到一个表的关系 [英] Get Relations of a Table

问题描述

我想获得一个SQL Server 表格的关系（或外键），在我的C＃code。 我怎样才能做到这一点？ 谢谢

I want to get relations (or foreign keys) of a Sql Server Table in my c# code. How can i do this? Thank you

推荐答案

这将让所有的外键的 dbo.YourTableName 引用：

This will get all the foreign keys that dbo.YourTableName references:

SELECT 
    FK = OBJECT_NAME(pt.constraint_object_id),
    Referencing_col = pc.name, 
    Referenced_col = rc.name
FROM sys.foreign_key_columns AS pt
INNER JOIN sys.columns AS pc
ON pt.parent_object_id = pc.[object_id]
AND pt.parent_column_id = pc.column_id
INNER JOIN sys.columns AS rc
ON pt.referenced_column_id = rc.column_id
AND pt.referenced_object_id = rc.[object_id]
WHERE pt.parent_object_id = OBJECT_ID('dbo.YourTableName');

如果你想获得所有引用 dbo.YourTableName 的外键，它只是稍有不同：

If you want to get all the foreign keys that reference dbo.YourTableName, it's only slightly different:

SELECT 
    -- add these two columns:
    [Schema] = OBJECT_SCHEMA_NAME(pt.parent_object_id),
    [Table] = OBJECT_NAME(pt.parent_object_id),
    FK = OBJECT_NAME(pt.constraint_object_id),
    Referencing_col = pc.name, 
    Referenced_col = rc.name
FROM sys.foreign_key_columns AS pt
INNER JOIN sys.columns AS pc
ON pt.parent_object_id = pc.[object_id]
AND pt.parent_column_id = pc.column_id
INNER JOIN sys.columns AS rc
ON pt.referenced_column_id = rc.column_id
AND pt.referenced_object_id = rc.[object_id]
WHERE pt.referenced_object_id = OBJECT_ID('dbo.YourTableName');
---------^^^^^^^^^^ change this

您可以把这个存储过程中，参数传递到 OBJECT_ID 函数的两部分名称，然后在C＃$ C $调用存储过程℃。

You can put this in a stored procedure, parameterize the two-part name you pass into the OBJECT_ID function, and then call the stored procedure from your C# code.

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