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GROUP BY and HAVING clauses

(count, sum, avg , max, min) that are carried out on all the objects (or the object tuples) in ... of numeric values. AVG - returns the average of numeric values as a double value. MIN - returns the minimum ... ), AVG (c.population) FROM Country c WHERE 'English' MEMBER OF c.languages All the Country objects

CriteriaBuilder.avg(x) - JPA Method

JPA Method in javax.persistence.criteria.CriteriaBuilder Expression avg (    Expression  x ) Create an aggregate expression applying the avg operation. Parameters: x - expression representing input value to avg operation Return: avg expression Since: JPA 2.0

FROM clause (JPQL / Criteria API)

but cannot be one of the following reserved words: ABS, ALL, AND, ANY, AS, ASC, AVG , BETWEEN, BIT_LENGTH

Is ObjectDB better than competing object databases?

do not support aggregate queries (max, min, count, sum and avg ). ObjectDB supports rich queries

JPA Query Structure (JPQL / Criteria)

;( where ). Criteria GROUP BY / HAVING  ( groupBy , having , count , sum , avg , min , max

ObjectDB Object Database Features

and aggregates ). ORDER BY (including ASC, DESC). Aggregates (COUNT, SUM, AVG , MAX, MIN). Query

JPA Criteria API Queries

, avg , min , max , ...). ORDER BY clause ( orderBy , Order , asc , desc ). The links above are direct

javax.persistence.criteria.CriteriaBuilder

Expression avg ( Expression  x) Create an aggregate expression applying the avg operation. Parameters: x - expression representing input value to avg operation Return: avg expression Since: JPA 2.0

javax.persistence.ConstructorResult

.createNativeQuery( "SELECT c.id, c.name, COUNT(o) as orderCount, AVG (o.price) AS avgOrder " + "FROM

ObjectDB 2.0.5

Fixed Java Agent / Java EE / Spring enhancement bug. Fixed a bug in merging detached entity objects. Fixed unexpected  NullPointerException in client server mode. Fixed an exception in AVG query on non numeric values ( issue #107 ). Fixed a bug in handling JOIN queries with primary key fields.

unexpected exception

:586) at pt.up.fe.dceg.neptus.imc.db.MessageDB. avg (MessageDB.java:63) at pt.up.fe.dceg.neptus.imc.db

unexpected exception - in query

:586) at pt.up.fe.dceg.neptus.imc.db.MessageDB. avg (MessageDB.java:63) at pt.up.fe.dceg.neptus.imc.db