如何使用SQL查询查找表的外键引用？ [英] How to find the Foreign key refernces of a table using SQL query?

问题描述

嗨
我只是想看一张表的外键引用，比如''foo''。我可以检查依赖项和所有但我不知道foo提到的表。那有什么问题???在此先感谢。

Hi I just want to see the foreign key reference of a table, say ''foo''. I can check the dependencies and all but I don''t know the refered tables with foo. Is there any query for that??? Thanks in advance.

推荐答案

阅读以下内容： http://stackoverflow.com/questions/8087325/finding-foreign-keys-in-ms-sql-server-with-information-schema [< a href =http://stackoverflow.com/questions/8087325/finding-foreign-keys-in-ms-sql-server-with-information-schematarget =_ blanktitle =New Window> ^ ]

Read the following : http://stackoverflow.com/questions/8087325/finding-foreign-keys-in-ms-sql-server-with-information-schema[^]

SELECT OBJECT_NAME(parent_object_id), OBJECT_NAME(referenced_object_id)
    FROM sys.foreign_keys
    WHERE referenced_object_id = OBJECT_ID(@mytable)

您好，



试试这个查询

Hi,

Try This Query

SELECT K_Table = FK.TABLE_NAME, FK_Column = CU.COLUMN_NAME, PK_Table = PK.TABLE_NAME, PK_Column = PT.COLUMN_NAME,
Constraint_Name = C.CONSTRAINT_NAME
FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS C
INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS FK ON C.CONSTRAINT_NAME = FK.CONSTRAINT_NAME
INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS PK ON C.UNIQUE_CONSTRAINT_NAME = PK.CONSTRAINT_NAME
INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE CU ON C.CONSTRAINT_NAME = CU.CONSTRAINT_NAME
INNER JOIN (
SELECT i1.TABLE_NAME, i2.COLUMN_NAME
FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS i1
INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE i2 ON i1.CONSTRAINT_NAME = i2.CONSTRAINT_NAME
WHERE i1.CONSTRAINT_TYPE = 'PRIMARY KEY'
) PT ON PT.TABLE_NAME = PK.TABLE_NAME
WHERE PK.TABLE_NAME='Your_Table_Name'
ORDER BY 1,2,3,4

问候，

GVPrabu

Regards,
GVPrabu

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