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Questions tagged composite-key

17 questions

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40
votes
3
answers

How to give a unique constraint to a combination of columns in Oracle?

sql oracle-database constraints unique-constraint composite-key
asked 2013-06-27T12:43:08.430
61
votes
1
answers

Creating Composite Key Entity Framework

c# entity-framework entity-framework-5 composite-key
asked 2013-02-14T10:53:59.377
8
votes
1
answers

How to implement composite keys in Neo4J

neo4j composite-key
asked 2013-02-06T10:07:34.073
12
votes
2
answers

Hadoop - composite key

hadoop composite-key
asked 2012-09-14T15:01:32.690
14
votes
5
answers

Eclipse error on mapping with @EmbeddedId

java eclipse hibernate jpa composite-key
asked 2012-08-24T08:55:30.447
15
votes
1
answers

Composite primary key, foreign key. Reference to object or key?

java jpa composite-key
asked 2012-06-09T12:08:31.993
17
votes
2
answers

Duplicate columns when using EmbeddedId with a ManyToOne mapping with Ebean

jpa playframework playframework-2.0 ebean composite-key
asked 2012-03-26T18:03:39.257
9
votes
2
answers

grails composite "unique constraint", but how?

grails foreign-keys grails-orm composite-key
asked 2011-11-06T20:30:32.590
14
votes
2
answers

How to use NOT EXISTS with COMPOSITE KEYS in SQL for inserting data from POJO

java sql database db2 composite-key
asked 2011-08-22T12:08:36.497
105
votes
2
answers

Composite Key with EF 4.1 Code First

ef-code-first composite-key entity-framework-4.1
asked 2011-03-28T23:53:06.187
116
votes
3
answers

composite key as foreign key

c# entity-framework ef-code-first foreign-keys composite-key
asked 2011-03-25T18:41:51.267
56
votes
3
answers

How to write JPQL SELECT with embedded id?

java jpa jpql composite-key
asked 2011-01-13T04:53:56.527
13
votes
10
answers

Why do I read so many negative opinions on using composite keys?

sql ms-access primary-key composite-key composite-primary-key
asked 2010-08-18T13:59:48.267
36
votes
9
answers

@OneToMany and composite primary keys?

java hibernate one-to-many annotations composite-key
asked 2010-04-09T23:36:04.077
10
votes
3
answers

hibernate composite key

java hibernate composite-key
asked 2010-02-20T06:03:14.660
52
votes
3
answers

Composite Primary Key performance drawback in MySQL

mysql performance primary-key composite-key
asked 2009-09-22T14:34:59.600
19
votes
4
answers

JPA Composite Key + Sequence

java hibernate jpa composite-key
asked 2008-10-28T11:08:56.590