Top "Orm" questions

Object-relational mapping (ORM) is a technique for mapping object-oriented systems to relational databases.

Any good ORM tools for Android development?

Anyone working on the Android ('gPhone') have or know of a place where I can find a good ORM tool …

java android sqlite orm crud
How do I properly cascade save a one-to-one, bidirectional relationship on primary key in Hibernate 3.6

I have an one-to-one, bidirectional entity relationship with shared keys. When I attempt to save the owner of the association …

java hibernate orm jpa jpa-2.0
Doctrine 2 update from entity

Is it possible to update an entity in a similar way as below: $data = new ATest(); // my entity $data->…

php orm doctrine-orm
What's the difference between JPA and Spring Data JPA?

I am a bit confused about the difference between Spring Data-JPA and JPA. I know about JPA that it is …

java hibernate jpa orm spring-data-jpa
a new object was found through a relationship that was not marked cascade PERSIST

In trying to get a @OneToMany relationship between Article and HeaderField I probably have the mapping not quite right, resulting …

jpa orm annotations many-to-many jpql
Doing an "IN" query with Hibernate

I have a list of IDs in a String, and want to use Hibernate to get the rows with these …

java hibernate orm jpa jpql
JPQL Create new Object In Select Statement - avoid or embrace?

I've learnt recently that it is possible to create new Objects in JPQL statements as follows: select new Family(mother, …

java hibernate orm jpa jpql
How do I do a JPQL SubQuery?

It is possible to do the equivalent of this sql query in JPQL? SELECT * FROM COUNTRIES c WHERE COUNTRY_ID …

java orm jpa jpql
Storing a Map<String,String> using JPA

I am wondering if it is possible using annotations to persist the attributes map in the following class using JPA2 …

java jpa orm jpa-2.0
How does group by works in sequelize?

I am looking for group by queries through Sequelize and cannot seem to find any documentation. SELECT column, count(column) …

javascript sql orm sequelize.js query-builder