Sql server 列被键入到哪个表

我有一个查询，它给出了我的列名、数据类型、最大长度、可空值

如果列有外键，我还需要知道该列引用的表的名称

这是我的问题

SELECT 
  c.name 'Column Name',
  t.Name 'Data type',
  c.max_length 'Max Length',
  c.is_nullable,
  ISNULL(i.is_primary_key, 0) 'Primary Key'
FROM    
  sys.columns c
INNER JOIN 
  sys.types t ON c.system_type_id = t.system_type_id
LEFT OUTER JOIN 
  sys.index_columns ic ON ic.object_id = c.object_id AND ic.column_id = c.column_id
LEFT OUTER JOIN 
  sys.indexes i ON ic.object_id = i.object_id AND ic.index_id = i.index_id
WHERE
  c.object_id = OBJECT_ID('Table_Name')

试试这个-

SELECT
      [Column Name] = c.name
    , [Data type] = t.name
    , [Max Length] = c.max_length
    , c.is_nullable
    , [Primary Key] = ISNULL(i.is_primary_key, 0)
    , IsFK = ISNULL(fkc.parent_object_id / fkc.parent_object_id, 0)
FROM sys.columns c WITH(NOWAIT)
JOIN sys.types t WITH(NOWAIT) ON c.system_type_id = t.system_type_id AND c.user_type_id = t.user_type_id
LEFT JOIN (
     SELECT i.[object_id], ic.column_id, i.is_primary_key
     FROM sys.indexes i WITH(NOWAIT)
     JOIN sys.index_columns ic WITH(NOWAIT) ON ic.[object_id] = i.[object_id] 
          AND i.index_id = ic.index_id
     WHERE i.is_primary_key = 1
) i ON c.[object_id] = i.[object_id] AND c.column_id = i.column_id
LEFT JOIN sys.foreign_key_columns fkc WITH(NOWAIT) ON fkc.parent_object_id = c.[object_id] 
     AND fkc.parent_column_id = c.column_id
WHERE c.[object_id] = OBJECT_ID('Table_Name')

---

多亏了德瓦特，你让我走上了正确的道路

以下是答案供将来参考

SELECT
      [Column Name] = c.name
    , [Data type] = t.name
    , [Max Length] = c.max_length
    , c.is_nullable
    , [Primary Key] = ISNULL(i.is_primary_key, 0)
    , OBJECT_NAME(fkc.referenced_object_id)
FROM sys.columns c WITH(NOWAIT)
JOIN sys.types t WITH(NOWAIT) ON c.system_type_id = t.system_type_id AND c.user_type_id = t.user_type_id
LEFT JOIN (
     SELECT i.[object_id], ic.column_id, i.is_primary_key
     FROM sys.indexes i WITH(NOWAIT)
     JOIN sys.index_columns ic WITH(NOWAIT) ON ic.[object_id] = i.[object_id] 
          AND i.index_id = ic.index_id
     WHERE i.is_primary_key = 1
) i ON c.[object_id] = i.[object_id] AND c.column_id = i.column_id
LEFT JOIN sys.foreign_key_columns fkc WITH(NOWAIT) ON fkc.parent_object_id = c.[object_id] 
     AND fkc.parent_column_id = c.column_id
WHERE c.[object_id] = OBJECT_ID('TableName')

---

实际上可能是重复的。重点是，这里有很多问题涉及到外键的元数据信息，只需查找

sys.foreign\u keys

和

sys.foreign\u keys\u columns

，您应该可以找到很多示例。您需要处理多列FKs吗？那么（我在野外看到过）一个参与多个FK的列呢？所有的外键列在外键中只有一个表。所有的例子都是反向的。我不想知道谁在使用给定的表，我想知道该列引用了哪些表（如果有的话）。这会告诉我该列是否有外键，但我需要外键的表名。