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SQL SERVER: Find all Primary and Foreign Key Constraints on each or any table in database

Introduction: In this article I am going to share how to check what constraints(Primary & Foreign key) are implemented on each tables and on what columns in database. 


Implementation: Let’s write sample query to get all the primary & foreign Key constraints.

Query to check primary key constraints on all tables

SELECT I.name AS PrimaryKeyName,
OBJECT_NAME(IC.OBJECT_ID) AS TableName,
COL_NAME(IC.OBJECT_ID,IC.column_id) AS PrimaryKeyColumnName
FROM SYS.INDEXES AS I
INNER JOIN SYS.INDEX_COLUMNS AS IC
ON I.OBJECT_ID = IC.OBJECT_ID
AND I.index_id = IC.index_id
WHERE I.is_primary_key =ORDER BY OBJECT_NAME(IC.OBJECT_ID)

Query to check primary key constraints in specific table

SELECT I.name AS PrimaryKeyName,
OBJECT_NAME(IC.OBJECT_ID) AS TableName,
COL_NAME(IC.OBJECT_ID,IC.column_id) AS PrimaryKeyColumnName
FROM SYS.INDEXES AS I
INNER JOIN SYS.INDEX_COLUMNS AS IC
ON I.OBJECT_ID = IC.OBJECT_ID
AND I.index_id = IC.index_id
WHERE I.is_primary_key = 1 AND OBJECT_NAME(IC.OBJECT_ID)='YourTableName'
ORDER BY OBJECT_NAME(IC.OBJECT_ID)

Query to check foreign key constraints in all tables

SELECT FR.name AS ForeignKeyName,
OBJECT_NAME(FR.parent_object_id) AS TableName,
COL_NAME(FC.parent_object_id,
FC.parent_column_id) AS ColumnName,
OBJECT_NAME (FR.referenced_object_id) AS ReferenceTableName,
COL_NAME(fc.referenced_object_id,
fc.referenced_column_id) AS ReferenceColumnName
FROM SYS.FOREIGN_KEYS AS FR
INNER JOIN SYS.FOREIGN_KEY_COLUMNS AS FC
ON FR.OBJECT_ID = FC.constraint_object_id ORDER BY OBJECT_NAME(FR.parent_object_id)


Query to check foreign key constraints in specific table

SELECT FR.name AS ForeignKeyName,
OBJECT_NAME(FR.parent_object_id) AS TableName,
COL_NAME(FC.parent_object_id,
FC.parent_column_id) AS ColumnName,
OBJECT_NAME (FR.referenced_object_id) AS ReferenceTableName,
COL_NAME(fc.referenced_object_id,
fc.referenced_column_id) AS ReferenceColumnName
FROM SYS.FOREIGN_KEYS AS FR
INNER JOIN SYS.FOREIGN_KEY_COLUMNS AS FC
ON FR.OBJECT_ID = FC.constraint_object_id 
AND OBJECT_NAME(FR.parent_object_id)='YourTableName' 
ORDER BY OBJECT_NAME(FR.parent_object_id)

Now over to you:
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1 comments:

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March 18, 2016 ×

Came to your article for some other query, but now i am really curious to know how you added code conversion box?

Congrats bro Robert Brunelle you got PERTAMAX...! hehehehe...
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