sql server 2008 - 無外鍵的整數列

Question

繼承了傳統的Sql server數據庫後，我希望按表列出所有沒有外鍵的整數列，因爲有些列將缺少FK，有些只是整數列。任何人都可以提出一個查詢來顯示這些信息？很明顯，這裏涉及到一些人爲干預。

謝謝。

Answer 1

您可以從information_schema獲取。我開始是這樣的：

SELECT * from INFORMATION_SCHEMA.COLUMNS c 
LEFT JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE k 
ON 
    c.TABLE_CATALOG = k.TABLE_CATALOG 
    AND c.TABLE_SCHEMA = k.TABLE_SCHEMA 
    AND c.TABLE_NAME = k.TABLE_NAME 
    AND c.COLUMN_NAME = k.COLUMN_NAME 
WHERE c.DATA_TYPE in ('int') AND CONSTRAINT_NAME is null 

Answer 2

這一個使用SQL服務器只訪問量：

select so.name as TableName, col.name as ColumnName 
from 
    sys.objects so 
     inner join sys.columns col on so.object_id = col.object_id and col.system_type_id in (48,52,56,127) 
     left outer join sys.foreign_key_columns fkc on fkc.parent_object_id = so.object_id and fkc.parent_column_id = col.column_id 
where 
    so.type='U' 
    and fkc.constraint_column_id is null 
order by so.name