I am using a D2k 6i form and getting the error on form from stored database(oracle9i) procedure ORA-00001:Unique constraint(.) violated but i m not able to t开发者_StackOverflow中文版race out from whi
In a table i want to ensure that only uni开发者_运维知识库que vales exist over the five-column key:
Whenever I insert an entity that already exists in the database, I get an error because there is a unique constraint on one of the fields (email).
Working on some legacy hibernate code. How do I do the following with hbm.xml(hibernate mapping file) instead of with annotations?
I\'m trying to validate uniqueness of some field in my model with one catch - it shouldn\'t raise an error if records have some shared relation. For the sake of example, here\'s what I mean:
I can find syntax \"charts\" on this on the SQLite website, but no examples and my code is crashing. I have other tables with unique constraints on a single column, but I want to add a constraint to t
I have the following schema: ParcelsSegmentsSegmentsParcels ==================================== ParcelIDSegmentIDParcelID
I want to set unique key constraint for Db4oEmbedded EmbeddedConfiguration. Here goes my code: EmbeddedConfiguration myConf = Db4oEmbedded.newConfiguration();
Why are UNIQUE Constraints needed in database ? Can you provide any examples ? Primary Key is UNIQ开发者_运维技巧UE by default... Understandable as they are referred in other tables as Foreign key
I\'m still in the process of learning hibernate/hql and I have a question that\'s half best practices question/half sanity check.
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