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ObjectDB Object Database Features

expressions). GROUP BY (including HAVING and aggregates). ORDER BY (including ASC, DESC). Aggregates
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ORDER BY clause (JPQL / Criteria API)

WHERE 'Europe' MEMBER OF c.continents GROUP BY c.currency HAVING COUNT(c) > 1 ORDER BY c.currency The ORDER
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Chapter 4 - JPA Queries (JPQL / Criteria)

BY, HAVING, ORDER BY): Then the expressions that are used for building JPQL and criteria query
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javax.persistence.criteria.Subquery

: having clause predicate Since: JPA 2.0 Class<?> getJavaType() Return the Java type of the tuple element ... : the modified query Since: JPA 2.0 Subquery<T> having( Predicate... restrictions) Specify restrictions ... restriction predicates. Replaces the previously added having restriction(s), if any. If no restrictions
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javax.persistence.criteria.CriteriaQuery

have been specified. Returns: having clause predicate Since: JPA 2.0 List<Order> getOrderList() Return ... Since: JPA 2.0 AbstractQuery<T> having(Predicate... restrictions) Specify restrictions over the groups ... the previously having added restriction(s), if any. If no restrictions are specified, any
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javax.persistence.criteria.AbstractQuery

if no restrictions have been specified. Returns: having clause predicate Since: JPA 2.0 Predicate getRestriction ... query Since: JPA 2.0 AbstractQuery<T> having( Predicate... restrictions) Specify restrictions ... predicates. Replaces the previously having added restriction(s), if any. If no restrictions are specified
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javax.jdo.JDOEntityManager

) Get the objects managed by this persistence manager having the specified object states. Get the objects managed by this persistence manager having the specified object states. Parameters: states - The states ... having the specified object states and being instances of the specified classes. Get the objects managed
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javax.jdo.PersistenceManager

by this persistence manager having the specified object states. Get the objects managed by this persistence manager having the specified object states. Parameters: states - The states of objects ... > states, Class... classes) Get the objects managed by this persistence manager having the specified
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javax.jdo.Query

the grouping expressions, optionally including a "having" clause. Set the grouping expressions, optionally including a "having" clause. When grouping is specified, each result expression ... : group - a comma-delimited list of expressions, optionally followed by the "having" keyword and a boolean
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setGrouping(group)

Method javax.jdo.Query void setGrouping( String group ) Set the grouping expressions, optionally including a "having" clause. When grouping is specified, each result expression ... - a comma-delimited list of expressions, optionally followed by the "having" keyword and a boolean expression Since: JDO 2.0

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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