I am getting an Oracle error because of the SQL being generated for an association between tables.There is no开发者_C百科 compound primary key involved, but this problem did not occur before adding th
I have a use case where a user got some profiles: So a one-to-many association. This is mapped through these legacy tables in pseudo sql.
Edited 30th, 03:16, to show improved migration and model I have a table of elements that can each be connected to many other elements.Is it possible to do this in Rails\' migrations and models?(the f
I\'m using Entity Framework 4 and I\'ve recently changed one of the objects\' primary key to contain 2 columns instead of 1 (it used to have only its id - Guid - and now it has an id and a version - i
I have a problem with C#.NET (Visual Studio 2010). I have 2 datatables in SQL2005 express : Building which its primary key is \"building number\",
This question already has answers here: Closed 11 years a开发者_如何学Gogo. Possible Duplicate: Can a foreign key reference a non-unique index?
I am trying to cache an object in Hibernate\'s second level cache that has a composite-id mapped in my persistence-mapping file.The logs say that the first time I run the query, the class mapped as th
I am new to MS Access. Could anybody tell me how to define a composite primary k开发者_如何学编程ey in MS Access 2007.If memory serves correctly, you can hold SHIFT while selecting the fields in the d
The scenario is as follows Table A has a composite PK. Table A --------a1 (pk)开发者_JS百科 a2 (pk) a3 (pk) foo bar LastUpdateDate LastUpdateUser
I\'m using hbm2ddl (from the hibernate3-maven-plugin 2.2) to produce a DDL based on my JPA annotated entities. Normally, this works fine but I recently introduced an entity that uses a composite key m
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