獲取表格的關係

Question

我想在我的c＃代碼中獲得Sql Server Table的關係（或外鍵）。 我該怎麼做？ 謝謝

Answer 1

這將讓所有的外鍵dbo.YourTableName引用：

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'); 

如果你想獲得所有引用dbo.YourTableName外鍵，這只是稍有不同：

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 

你可以把它放在存儲過程中，參數化你傳遞給OBJECT_ID函數的兩部分名稱，然後從C＃代碼中調用存儲過程。