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Unable To Create Relationship Error - Why ??


Unable To Create Relationship Error - Why ??

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Gazley
Gazley
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ALTER TABLE [dbo].[Enrollment] ADD
CONSTRAINT [ClassStudentMap2Enrollment] FOREIGN KEY
(
[CSMid]
  REFERENCES [dbo].[ClassStudentMap] (
[CSMid]
  ON DELETE CASCADE
GO

Server: Msg 547, Level 16, State 1, Line 1
ALTER TABLE statement conflicted with COLUMN FOREIGN KEY constraint 'ClassStudentMap2Enrollment'. The conflict occurred in database 'Schoolwise', table 'ClassStudentMap', column 'CSMid'.

What's going on here? My brain is on strike. I dropped this table, created it again using a SELECT INTO from tmp_Enrollment and tried to recreate the constraints, indexes etc from a backup script of Enrollment. Everything went well apart from the above code.

Thanks.


Ninja's_RGR'us
Ninja's_RGR'us
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Have you checked for invalid data that may make the foreign key fail (maybe some data has been deleted in the parent table in between data transfers)?
Gazley
Gazley
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You little beauty - that was it - my brain was on strike

Thanks for the speedy reply - very much appreciated indeed.

Regards.


Ninja's_RGR'us
Ninja's_RGR'us
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I wouldn't go as far as say little, but I'll take the beauty part of the compliment .

HTH.
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