Comments on: SQL SERVER – Generate Foreign Key Scripts For Database

By: dbidba

dbidba — Mon, 02 May 2011 20:51:39 +0000

Thanks for posting this. Previously, I used a simpler script, but it does not handle foreign keys with multiple columns. I was dreading the more complex coding. This is being done to programatically accomplish the FK drops and creates during sliding window partition maintenance.

By: dedogs

dedogs — Fri, 29 Apr 2011 14:54:11 +0000

One more thing about my code… you have to output the results to text and then you have good formatting too.
Ow also thanks for the initial post. :)

By: dedogs

dedogs — Fri, 29 Apr 2011 14:50:53 +0000

My version based off raknel’s above formats the sql like MSMSS does. Good day!

SELECT
‘ALTER TABLE dbo.[' + object_name(fKeys.parent_object_id) + ']‘
+ CASE WHEN fKeys.is_not_trusted = 1
THEN ‘ WITH NOCHECK’
ELSE ”
END
+ ‘ ADD CONSTRAINT [' + fKeys.name + ']‘
+ ‘ FOREIGN KEY’ + char(13)
+ ‘(‘
+ LEFT(
(
SELECT pCols.name + ‘, ‘ AS [text()]
FROM sys.foreign_key_columns fKeyCols
INNER JOIN sys.columns pCols ON fKeyCols.referenced_column_id = pCols.column_id AND fKeyCols.referenced_object_id = pCols.object_id
WHERE fKeyCols.constraint_object_id = fKeys.object_id
ORDER BY fKeyCols.referenced_column_id
FOR XML PATH(”)
),
LEN(
(
SELECT pCols.name + ‘, ‘ AS [text()]
FROM sys.foreign_key_columns fKeyCols
INNER JOIN sys.columns pCols ON fKeyCols.referenced_column_id = pCols.column_id AND fKeyCols.referenced_object_id = pCols.object_id
WHERE fKeyCols.constraint_object_id = fKeys.object_id
ORDER BY fKeyCols.referenced_column_id
FOR XML PATH(”)
)
) -1
)
+ ‘) REFERENCES ‘ + object_name(fKeys.referenced_object_id) + char(13)
+ ‘(‘
+ LEFT(
(
SELECT rCols.name + ‘, ‘ AS [text()]
FROM sys.foreign_key_columns fKeyCols
INNER JOIN sys.columns rCols ON fKeyCols.parent_column_id = rCols.column_id AND fKeyCols.parent_object_id = rCols.object_id
WHERE fKeyCols.constraint_object_id = fKeys.object_id
ORDER BY fKeyCols.referenced_column_id
FOR XML PATH(”)
),
LEN(
(
SELECT rCols.name + ‘, ‘ AS [text()]
FROM sys.foreign_key_columns fKeyCols
INNER JOIN sys.columns rCols ON fKeyCols.parent_column_id = rCols.column_id AND fKeyCols.parent_object_id = rCols.object_id
WHERE fKeyCols.constraint_object_id = fKeys.object_id
ORDER BY fKeyCols.referenced_column_id
FOR XML PATH(”)
)
) -1
)
+ ‘)’ + char(13)
+ ‘GO’
FROM
(
SELECT DISTINCT referenced_object_id, parent_object_id, object_id, name, is_not_trusted
FROM sys.foreign_keys fKeys
WHERE object_name(fKeys.referenced_object_id) = ‘BOOKINGLINEISSUE’
) AS fKeys

By: Ram Kumar Gupta

Ram Kumar Gupta — Thu, 09 Dec 2010 07:09:31 +0000

HI Seenivasan,

Thanks a lot for the procedure. It saved lots of my time.

By: Jeff

Jeff — Tue, 17 Nov 2009 23:28:06 +0000

I like this script and can see where it can save me a lot of time. However I can not get it to work on any schema other then dbo. What change can I make to use scheams?

By: Nathan

Nathan — Tue, 19 May 2009 03:08:09 +0000

Hey man…I appreciate this posting.

It saved me a LOT of time and headache. A lot better than using the generate sql script wizard.

Thanks again.

By: Patel

Patel — Tue, 07 Apr 2009 21:33:59 +0000

Raknel – Thanks for the excellent suggestion/script

By: raknel

raknel — Thu, 23 Oct 2008 15:16:44 +0000

select ‘ALTER TABLE ‘+object_name(a.parent_object_id)+
case when a.is_not_trusted = 1 then ‘ WITH NOCHECK ‘
else ” end +
‘ ADD CONSTRAINT ‘+ a.name +
‘ FOREIGN KEY (‘ + c.name + ‘) REFERENCES ‘ +
object_name(b.referenced_object_id) +
‘ (‘ + d.name + ‘)’
from sys.foreign_keys a
join sys.foreign_key_columns b
on a.object_id=b.constraint_object_id
join sys.columns c
on b.parent_column_id = c.column_id
and a.parent_object_id=c.object_id
join sys.columns d
on b.referenced_column_id = d.column_id
and a.referenced_object_id = d.object_id
where object_name(b.referenced_object_id) in
(select name from sys.tables)
order by c.name

By: Shyam Bhavsar

Shyam Bhavsar — Wed, 30 Jul 2008 05:27:28 +0000

hello friendz !!

I would like to know about foreign key reference in same database, my problem is –

I have 2 tables
table 1 –
CREATE TABLE [dbo].[Increment](
[Org_Value_ID] [numeric](9, 0) NOT NULL,
[Ph_Code] [numeric](9, 0) NOT NULL,
[Sr_No] [int] NOT NULL,
[Increment_S] [numeric](15,2) NULL,
[Increment_V] [numeric](15,2) NULL,
CONSTRAINT [PK_Increment] PRIMARY KEY CLUSTERED
(
[Org_Value_ID] ASC,
[Ph_Code] ASC,
[Sr_No] ASC
)) ON [PRIMARY]

Table 2 –
CREATE TABLE [dbo].[Org_Value](
[Org_Value_ID] [numeric](9, 0) NOT NULL,
[Ph_Code] [numeric](9, 0) NOT NULL,
[Entitled] [numeric](9, 2) NULL,
CONSTRAINT [PK_Org_Value] PRIMARY KEY CLUSTERED
(
[Org_Value_ID] ASC,
[Ph_Code] ASC
)) ON [PRIMARY]

I want to add foreign key reference from Org_value to Increment on Org_value_id & Ph_Code

when i tried –
ALTER TABLE [dbo].[Org_Value] WITH CHECK ADD CONSTRAINT [FK_Org_Value_Increment] FOREIGN KEY([Org_value_ID], [Ph_Code]) REFERENCES [dbo].[Increment] ([Org_Value_ID],[Ph_Code])

I am getting error -
There are no primary or candidate keys in the referenced table ‘dbo.Increment’ that match the referencing column list in the foreign key ‘FK_Org_Value_Increment’.

Please provide some comments, what should i do ?

By: doc_sewell

doc_sewell — Wed, 18 Jun 2008 02:26:09 +0000

so how come he says cusror instead of cursor? What if I just want to show all the tables with FKs and the FK names and the status if they are enabled or disabled?