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FAQ
4

What are the main benefits of using ObjectDB?

multiple values (even for a simple data structure such as a collection of strings). In addition
Manual
4

WHERE clause (JPQL / Criteria API)

, relational operators, logical operators) and functions (numeric functions, string functions, collection
Manual
4

Obtaining a JPA Database Connection

string that ends with .odb or .objectdb is considered by ObjectDB to be a database url
Manual
4

CRUD Database Operations with JPA

p"); System.out.println("Total Points: " + q1.getSingleResult()); The query string ("SELECT
Manual
4

JPA / JDO Class Enhancer

can also be passed to the enhance method as a single string delimited by commas or spaces. In
JDO Doc
4

javax.jdo.annotations.Join

) Annotation for the join of a relation. Corresponds to the xml element "join". Since: JDO 2.1 String ... : the vendor extensions Default value: {} Since: JDO 2.1 String foreignKey Name for a generated foreign ... foreign key constraint Default value: "" Since: JDO 2.1 String generateForeignKey Generate or assume
JPA Doc
4

javax.persistence.AttributeOverride

; @Version protected Integer version; protected String address; public Integer getId() { ... } public void setId(Integer id) { ... } public String getAddress() { ... } public void setAddress(String address) { ... } } @Entity @AttributeOverride(name
JDO Doc
4

javax.jdo.annotations.Query

. Returns: the vendor extensions Default value: {} Since: JDO 2.1 String fetchPlan The name ... Default value: "" Since: JDO 2.1 String language The query language The query language Returns: the query language Default value: "JDOQL" Since: JDO 2.1 String name Name of the query (mandatory) Name
JDO Doc
3

javax.jdo.annotations.Column

for a column in the database. Corresponds to the xml element "column". Since: JDO 2.1 String ... : "" Since: JDO 2.1 String defaultValue Default value for this column. Default value for this column. Returns ... extensions. Vendor extensions. Returns: the vendor extensions Default value: {} Since: JDO 2.1 String
JDO Doc
3

javax.jdo.identity.StringIdentity

, Comparable This class is for identity with a single String field. Since: JDO 1.0 StringIdentity ... (Class pcClass, String key) Constructor with class and key. Constructor with class and key ... : true if the class or class name is the same Since: JDO 1.0 String getKey() Return the key. Return