composite-key Questions
2
Solved
i am working on mysql server.where i have created a table, named question . column/attributes of this table are (course,subject,year,question)
i want to create a primary key(or composite key) consi...
Lombardi asked 8/3, 2013 at 19:43
4
Solved
I have a composite primary key in 1 table in oracle. I want to create a foreign key for one table entry in my second table that references the composite primary key in the first table. I am getting...
Morrissette asked 6/7, 2011 at 19:53
4
Solved
I'm getting to grips with EF4 code first, and liking it so far. But I'm having trouble mapping an entity to a table with a composite primary key.
The configuration I've tried looks like this:
pub...
Clerc asked 28/4, 2010 at 21:26
1
Solved
I want to query data filtering by composite keys other than Row Key in CQL3.
These are my queries:
CREATE TABLE grades (id int,
date timestamp,
subject text,
status text,
PRIMARY KEY (id, sub...
Transcalent asked 18/7, 2013 at 23:41
2
I have two classes documentlog and documentversion(with primary keys: int doc_id and int docVersionID) with a many-to-one relationship. I used a composite key class called CompundKey to manage the ...
Diffusivity asked 8/11, 2010 at 0:13
1
Solved
Shortly, I want to create composite keys on my table remaining with the primary key in order to improve sql server search performance. The performance issue occurs on 200k data table whenever I sea...
Phalanx asked 14/2, 2013 at 10:53
1
Solved
public class UserBuilding
{
[Key, Column(Order = 0)]
public int UserId { get; set; }
[Key, Column(Order = 1)]
public int BuildingId { get; set; }
public int BuildingLevel { get; set; }
}
...
Hennessy asked 8/2, 2013 at 21:38
1
Solved
I need to ensure that a combination of more than one property values in all nodes is unique. How to do that in Neo4J.
From Neo4J documentation available at http://docs.neo4j.org/chunked/milestone/...
Fibrous asked 6/2, 2013 at 10:7
2
Solved
I have the following tables in my database:
Announcements:
- AnnouncementID (PK)
- Title
AnouncementsRead (composite PK on AnnouncementID and UserID):
- AnnouncementID (PK)
- UserID (PK)
- DateRe...
Mismatch asked 9/8, 2010 at 10:32
4
Solved
Is it possible in plain JPA or JPA+Hibernate extensions to declare a composite key, where an element of the composite key is a sequence?
This is my composite class:
@Embeddable
public class Integ...
Rizo asked 28/10, 2008 at 11:8
3
Solved
I have a table with two int values that are IDs. On their own these IDs can show up any number of times in the table, but together they should only ever appear once.
Is there a way to make a pair ...
Pokey asked 6/10, 2012 at 20:46
2
Solved
Suppose I have a tab delimited file containing user activity data formatted like this:
timestamp user_id page_id action_id
I want to write a hadoop job to count user actions on each page, so the...
Damnation asked 14/9, 2012 at 15:1
3
Solved
I realise there might be similar questions but I couldn't find one that was close enough for guidance.
Given this spec,
Site
---------------------------
SiteID int identity
Name varchar(50)
Seri...
Oliver asked 27/10, 2009 at 14:9
2
Solved
I have a table with rows in the following format:
transactionDate, purchaseOrderId
8/8/2012, 55
8/9/2012, 55
8/8/2012, 88
8/9/2012, 55
8/10/2012, 77
I want to find all rows where the transaction...
Tumultuous asked 24/8, 2012 at 18:21
2
Solved
I'm trying to understand Cassandra's storage engine when it comes to composite columns. Unfortunately, the documentation I've read so far contains errors and is leaving me a bit blank.
First, term...
Defant asked 15/8, 2012 at 22:41
1
Is there a way to add a composite (multi-column) foreign key to an InnoDB table via the PhpMyAdmin interface? I already have the appropriate composite primary key in the target table, and I can sin...
Chrisse asked 16/5, 2011 at 16:31
1
Solved
I have two classes Foo and Bar. The tables in the database look like this:
|Foo|
|id : INT (PK) | bar_id : INT (PK, FK) |
|Bar|
|id : INT (PK) |
Normally I would map it like this:
@Entity
publ...
Sturm asked 9/6, 2012 at 12:8
1
Solved
I have four entities that I would like to translate into database tables via code first fluent api (I'm using a model found at databaseanswers.org), but I'm not certain as to how. The problem I'm h...
Entwine asked 14/4, 2012 at 14:52
1
Solved
I am using eclipselink for JPA. I have an entity, which has a composite key fabricated out of two fields. Following is my Embeddable primary key class' fields(members).
@Embeddable
public class ...
Drawtube asked 9/4, 2012 at 18:57
2
Solved
I've to test different datamodels for Cassandra. I'm thinking about to use a composite key made by key1:key2 for the row key.
With this configuration on Cassandra, for example, I can query to have...
Waterline asked 26/3, 2012 at 13:18
3
Solved
I have two classes. One is the entity class, the other serves as a composite key class.
The code is as followed.
@Entity
public class Supply {
@Embeddable
class Id implements Serializable {
...
Gao asked 24/7, 2011 at 5:41
1
Solved
I am trying to create a composite foreign key relationship/constraint. All tables are empty. I have this table:
CREATE TABLE [dbo].[ChemSampleValueTest](
[SampleNumber] [int] NOT NULL,
[Parame...
Confidential asked 8/3, 2012 at 3:7
3
Is it necessary that composite-id should be mapped to class ??
can it be like this ?
<composite-id>
<key-property=..../>
<key-property=..../>
</composite-id>
or should...
Indistinguishable asked 20/2, 2010 at 6:3
5
Solved
I have a list of items. Most of these items will not be in stock. The item table has id, name, description. The quantities of items are stored in another table named inventory. The inventory table ...
Professoriate asked 8/1, 2012 at 12:33
2
I'm very close to a solution but anything is still wrong, hope to get help, thanks in advance.
I have a Customer domain model like:
class BoCustomer implements Serializable{
String firstName
S...
Bari asked 6/11, 2011 at 20:30
© 2022 - 2024 — McMap. All rights reserved.