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Script for all FK Constraints in a Database?
Message
 
General information
Forum:
Microsoft SQL Server
Category:
Other
Environment versions
SQL Server:
SQL Server 2008
Miscellaneous
Thread ID:
01537261
Message ID:
01537292
Views:
21
>>>>Hi,
>>>>
>>>>Is there a way to create a script of all FK Constraints in a database such that I could apply this script to anther database? or the same database after some or all of the constraints are deleted?
>>>>
>>>>TIA.
>>>
>>>
>>>SELECT 
>>> OBJECT_NAME(f.rkeyid) PK_Table_name,
>>> c2.name PK_Column_name,
>>> OBJECT_NAME(f.constid) Constraint_name,
>>> OBJECT_NAME(f.fkeyid) FK_Table_name,
>>> c1.name FK_Column_name
>>>FROM dbo.sysforeignkeys f
>>>INNER JOIN dbo.syscolumns c1 ON c1.id = f.fkeyid AND c1.colid = f.fkey
>>>INNER JOIN dbo.syscolumns c2 ON c2.id = f.rkeyid AND c2.colid = f.rkey
>>>--where Object_Name(fkeyId) = 'Foreign Table Name' 
>>>ORDER BY PK_Table_name, FK_Table_name, FK_Column_name;
>>>
>>>Alternatively
>>>
>>>SELECT 
>>>    PK_Table  = PK.TABLE_NAME,    
>>>    PK_Column = PT.COLUMN_NAME, 
>>>    FK_Table  = FK.TABLE_NAME, 
>>>    FK_Column = CU.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 
>>>-- optional: 
>>>ORDER BY 
>>>    1,2,3,4
>>
>>I am looking at your code and it does show the list of FK constraints (I am learning a lot from these examples). But how do I actually display to the Query window the FK scripts?
>>
>>Another approach I found that could possible do what I am looking to do is to right-mouse click on the Database and then go to Tasks -> Generate Scripts. But then I need to create only the Foreign Key constraints. And on the Choose Script Options it looks like I can disable (False) all but the Script Foreign Keys option. But I have not done it since I don't know if these options will change permanently in the SQL Server. And next time I might need to script all options.
>
>The blog link I gave you does 'ALTER TABLE' script to drop / add constraints.
>
>Alternatively, you should be able to do it with the PowerShell script. You may want to google on 'PowerShell foreign constraints script'

Thank you. I will follow your suggestion.
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
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