composite-primary-key

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Hibernate: Where do insertable = false, updatable = false belong in composite primary key constellations involving foreign keys?

When implementing composite primary keys in Hibernate or other ORMs there are up to three places where to put the insertable = false, updatable = false in composite primary key constellations that use[详细]

2023-01-15 02:37 分类：问答
SQL Server 2005 error retrieving record based on Datetime primary key column

I h开发者_如何学JAVAave a table in SQL Server 2005 with composite primary key, i.e. a foreign key (INT) and DateTime column.[详细]

2023-01-13 07:55 分类：问答
Nhibernate foreign key as composite key

Hi I am pretty new to Nhibernate and I am working on a project that is described as follow: 1 \"Parents\" table containing ParentName and a one to many ChildrenList using IList, with Primary Key set[详细]

2023-01-10 23:23 分类：问答
SQL Server 2005: Getting error when setting auto increment on one of two primary keys

I am getting an error \"Cannot insert explicit value for identity column in table \'table\' when IDENTITY_INSERT is set to OFF.\"开发者_开发技巧[详细]

2023-01-08 15:42 分类：问答
Ruby On Rails multiple composite primary keys question

I am a new guy in Ruby, and I have tables with these primary keys: transaction_types: transaction_type transaction_headers:[详细]

2023-01-06 12:48 分类：问答
Timestamp as part of composite primary key?

I get this error when using linq-to-sql with timestamp as part of a composite primary key: \"The primary key column of type \'Timestamp\' cannot b开发者_JAVA技巧e generated by the server.\"[详细]

2022-12-27 03:27 分类：问答
How to update primary key

Here is my problem - I have 2 tables: WORKER, with columns |ID|OTHER_STAF| , where ID is primar开发者_开发问答y key[详细]

2022-12-24 08:37 分类：问答
What are the pros and cons of using multi column primary keys?

I would like to see an example of: When this is appropriate When this is not appropriate Is there a time when the choice of da开发者_StackOverflowtabase would make a difference to the above exampl[详细]

2022-12-19 10:19 分类：问答
Composite key or New Unique key

I want to know which will be the best. I am having a table say A having col1(is a foreign key fk1),col2(is also a foreign keyfk2).[详细]

2022-12-19 08:49 分类：问答