unique-constraint

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How to find out line number, procedure name in PL/SQL in case of an error

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[详细]

2022-12-29 23:18 分类：问答
SQL Server: "Mostly-unique" index

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:[详细]

2022-12-29 21:52 分类：问答
Check if entity already exists in database before inserting with Doctrine

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).[详细]

2022-12-29 09:32 分类：问答
How to do multiple column UniqueConstraint in hbm?

Working on some legacy hibernate code. How do I do the following with hbm.xml(hibernate mapping file) instead of with annotations?[详细]

2022-12-28 21:17 分类：问答
Rails - validates_uniqueness_of model field with the inverse of :scope

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:[详细]

2022-12-28 20:42 分类：问答
SQLite table constraint - unique on multiple columns

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[详细]

2022-12-27 19:20 分类：问答
Consolidating values and deleting duplicates in a junction table using CTE

I have the following schema: ParcelsSegmentsSegmentsParcels ==================================== ParcelIDSegmentIDParcelID[详细]

2022-12-27 08:44 分类：问答
Setting unique key constraint for Db4oEmbedded EmbeddedConfiguration

I want to set unique key constraint for Db4oEmbedded EmbeddedConfiguration. Here goes my code: EmbeddedConfiguration myConf = Db4oEmbedded.newConfiguration();[详细]

2022-12-26 14:42 分类：问答
UNIQUE Constraints in SQL (SQL Server)

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[详细]

2022-12-26 07:22 分类：问答
hibernate column uniqueness question

I\'m still in the process of learning hibernate/hql and I have a question that\'s half best practices question/half sanity check.[详细]

2022-12-24 06:56 分类：问答