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26

JPA Criteria API Queries

). FROM clause (from, join, fetch). WHERE clause (where). GROUP BY / HAVING clauses (groupBy, having
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JPA Query Structure (JPQL / Criteria)

GROUP BY / HAVING (groupBy, having, count, sum, avg, min, max, ...). Criteria ORDER BY (orderBy, Order, asc, desc).
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javax.persistence.criteria.Subquery

has been set. Returns: selection item Since: JPA 2.0 Subquery<T> groupBy(List< Expression<?>> grouping ... subquery Since: JPA 2.0 AbstractQuery<T> groupBy(List< Expression<?>> grouping) Specify the expressions ... Subquery<T> groupBy( Expression... grouping) Specify the expressions that are used to form groups
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javax.persistence.criteria.CriteriaQuery

: selection item Since: JPA 2.0 AbstractQuery<T> groupBy(List<Expression<?>> grouping) Specify ... Since: JPA 2.0 CriteriaQuery<T> groupBy(List<Expression<?>> grouping) Specify the expressions ... > groupBy(Expression... grouping) Specify the expressions that are used to form groups over the query
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javax.persistence.criteria.AbstractQuery

if no selection has been set. Returns: selection item Since: JPA 2.0 AbstractQuery<T> groupBy(List ... expressions Returns: the modified query Since: JPA 2.0 AbstractQuery<T> groupBy( Expression... grouping

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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