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Query to find Related tables, related by Foreign Key and Primary Key

Many times, When we come to a situation to start our work from already developed project, Where Foreign Keys and Primary Keys are already developed in Database, It is Necessary for us to know which table is referring to which table as with Primary Key and Foreign Key Constraint.

For this Purpose, We have System Tables which will Help us to find the Primary key and Foreign key and related Tables.

The query is as follows:


USE ADVENTUREWORKS2008
GO

SELECT OBJECT_NAME(SFK.PARENT_OBJECT_ID) AS [FORIEGN KEY TABLE]
 ,COL_NAME(SFKC.PARENT_OBJECT_ID, SFKC.PARENT_COLUMN_ID) AS [FORIEGN KEY COLUMN]
 ,OBJECT_NAME(SFK.REFERENCED_OBJECT_ID) AS [PRIMARY KEY TABLE]
 ,COL_NAME(SFKC.REFERENCED_OBJECT_ID, SFKC.REFERENCED_COLUMN_ID) AS [PRIMARY KEY COLUMN]
FROM SYS.FOREIGN_KEYS AS SFK
INNER JOIN SYS.FOREIGN_KEY_COLUMNS AS SFKC ON SFK.OBJECT_ID = SFKC.CONSTRAINT_OBJECT_ID




Here I'm trying to find Related tables under Primary key and 


Foreign key Constraint in AdventureWorks2008 Database.






Here,





--OBJECT_NAME:
Returns the database object name for schema-scoped objects. 



--COL_NAME:    Returns the name of a column from a
specified corresponding table identification number and column identification
number. 



--SYS.FOREIGN_KEYS:
Contains a list of all FOREIGN KEYS in the database. It contains one row per
FOREIGN KEY. 



--SYS.FOREIGN_KEY_COLUMNS:
Contains a row for each column, or set of columns, that comprise a foreign key.







































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