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JDO Doc
8

javax.jdo.Query

There are two namespaces in queries. Type names have their own namespace that is separate from the namespace for fields, variables and parameters. The method setClass introduces the name of the candidate class in the type namespace. The method declareImports introduces the names of the imported class or interface types
Manual
7

Auto Generated Values

identity generator is managed per type hierarchy, so generated values are unique only per type
Manual
7

GROUP BY and HAVING clauses

 interface provides methods for building aggregate expressions: count, countDistinct - return a long type ... representing the sum of values. avg - returns a double type expression representing the average
JDO Doc
7

JDO Predefined ID Classes

but should not be used as the type of a primary key field in a persistence capable class. For example, to use a String primary key define a primary key field of type String: @PersistenceCapable public
Manual
7

JPA Lifecycle Events

of the lifecycle event. The argument can have any type that matches the actual value (e.g. in the code above, Object can be replaced by a more specific type). The listener class should be stateless
Manual
7

JPA Query Expressions (JPQL / Criteria)

, navigation and types (get, type). Arithmetic expressions (sum, diff, prod, quot, mod, abs, neg
Tutorial
7

Step 5: Add a JSP Page

method="POST" action="GuestServlet"> Name: type="text" name="name" /> type="submit" value="Add" />
Tutorial
7

Step 5: Add a JSP Page

"> Name: type="text" name="name" /> type="submit" value="Add
Tutorial
7

Step 5: Add a JSP Page

"> Name: type="text" name="name" /> type="submit" value="Add
Tutorial
7

Step 5: Add a JSP Page

method="POST" action="guest"> Name: type="text" name="name" /> type="submit" value="Add" />