composite-key

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Efficient HashMap retrieval with key composite key (build from 2 enums)

I have a 2 enum values representing a mapping to object which I\'m (currently) modeling with a HashMap with the 2 enums values are used as key and the object is the value.[详细]

2023-01-16 23:25 分类：问答
Junction tables in T-SQL

In my database application, when I try t开发者_如何学Co attach a page to a site, I get the following error:[详细]

2023-01-14 20:20 分类：问答
Mapping multiple-row per item objects in Hibernate

I\'m encountering somewhat of an, uh, unorthodox design and I\'m not quite sure how to handle it. The table I\'m trying to map looks like:[详细]

2023-01-13 23:10 分类：问答
How to map a composite key with JPA and Hibernate?

In this code, how to generate a Java class for the composite key (how to composite key in hibernate):[详细]

2023-01-13 03:30 分类：问答
Hibernate composite key which are foreigen key to another table

I have two table Part and SubPart. Part table has general fields like id, name, desc etc. The SubPart table has part_id, sub_part_id as composite key. Both of these columns are referring to Part table[详细]

2023-01-12 14:28 分类：问答
Sql Server, Composite Primary keys and clustered indexes

How does Sql Server 开发者_JAVA百科handle fill factor on tables with clustered indexes on composite primary keys?[详细]

2023-01-11 06:48 分类：问答
Validation rule for a composite unique index (non-primary)

I am sure I am not the first who has composite unique keys in tables and who wants to validate them. I do not want to invent the bicycle so I ask here first. I have several table开发者_C百科s that hav[详细]

2023-01-10 17:40 分类：问答
SQL Server composite key experience

I want to make a composite key (well that\'s the idea but I\'m open to other suggestions) on a Documents table. It would consist of two columns, year (2010,...) and an ID, which would be autoincrement[详细]

2023-01-10 01:38 分类：问答
How to create a composite key on multiple columns

How can I create a composite key on multiple columns, one of which can have some value but not null (or some constant value)?[详细]

2023-01-09 19:38 分类：问答
Entity Framework CTP4 and composite keys

I was playing with EntityFramework CTP4 and decided to apply it to one of my current projects. The application uses a SQLServer database and there is one table with a composite key. Say, table \"MyEnt[详细]

2023-01-08 18:40 分类：问答