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About INSERT INTO

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Manual
4

Database Schema Evolution

of an old schema is loaded into memory it is automatically converted into an instance of the up to date
Manual
4

Detached Entity Objects

the database unless modified detached objects are merged back into an EntityManager to become managed ... detached entity object is copied into an existing managed entity object with the same identity (i.e
Manual
4

JPA Entity Fields

Fields of persistable user defined classes (entity classes, embeddable classes and mapped superclasses) can be classified into the following five groups: Transient fields Persistent fields Inverse ... ; } If a version field exists, ObjectDB automatically injects the version value into that field. Version fields
JPA Doc
4

JPA Queries

JPQL strings into a valid complete JPQL query. JPA 2 introduced the JPA Criteria Query API, as ... ). Criteria Query Elements Criteria query elements are organized in this reference into three groups
Manual
4

Paths and Types in JPQL and Criteria API

expressions in the above code can be divided into two main groups: FROM variable expressions, represented ... affect the built query directly. The constructed expression must be integrated into query clauses
Tutorial
4

Step 3: Define a Spring DAO Component

the instantiation of the DAO component class and injects an instance of the DAO component class into the controller, as shown in the next step. Prepares an EntityManager automatically and injects it into the em
Tutorial
4

Step 3: Define a Spring DAO Component

component class and injects an instance of the DAO component class into the controller, as shown in the next step. Prepares an EntityManager automatically and injects it into the em field
Tutorial
4

Step 3: Define an EJB Session Bean

of the EJB class and injects an instance of the EJB class into the servlet (as shown in the next step). Prepares an EntityManager automatically and injects it into the em field (because it is annotated
Tutorial
4

Step 3: Define an EJB Session Bean

: Manages the instantiation of the EJB class and injects an instance of the EJB class into the servlet (as shown in the next step). Prepares an EntityManager automatically and injects it into the em field
JDO Doc
4

javax.jdo.annotations.Column

allowsNull Whether the column allows null values to be inserted. Whether the column allows null values to be inserted. Returns: whether the column allows null values to be inserted Default value ... insertValue Value to be inserted when this is an "unmapped" column Value to be inserted