About GROUP BY

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Tutorial
13

Step 1: Create a Maven Web Project

We start by creating a new Maven-WTP dynamic web project in Eclipse: Open the [New Project] dialog box, e.g. by using File > New > Project... Select Maven > Maven Project and click Next. Verify ... a filter, select maven-archetype-webapp in the artifact list and click Next. Enter Group Id (e.g
Manual
13

Auto Generated Values

number generator is also used to generate numeric values for primary key fields annotated by ... ) and an allocation size (the default is 50). A sequence is global to the application and can be used by ... . To minimize round trips to the database server, IDs are allocated in groups. The number of IDs in each
Manual
13

Chapter 4 - JPA Queries (JPQL / Criteria) [2011-04-01]

(and a criteria query) is explained by describing the main clauses of JPQL queries (SELECT, FROM, WHERE, GROUP BY, HAVING, ORDER BY): Then the expressions that are used for building JPQL and criteria query
Manual
13

Chapter 4 - JPA Queries (JPQL / Criteria) [2018-09-15]

(and a criteria query) is explained by describing the main clauses of JPQL queries (SELECT, FROM, WHERE, GROUP BY, HAVING, ORDER BY): Then the expressions that are used for building JPQL and criteria query
Tutorial
12

Step 1: Create a Maven Web Project

We start by creating a new Maven web project in NetBeans: Open the [New Project] dialog box, e.g. by using File > New Project... Select Maven > Maven Web Application and click Next. Choose a Project Name (e.g. Guestbook) and select Java EE 5. Enter Maven Group Id (e.g. com.objectdb.tutorial.spring
Issue
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Blocked by find

, Object obj)" method which is synchronized and attempts to load an object by id using the EntityManager ... .ObjectDbInstanceContainer@9c71a4 owned by: DEV1-WSAgent-1-Existing/3 Total blocked: 190 Total waited: 69 ... : BLOCKED on com.objectdb.o.LKM@254e85f4 owned by: ODB-FileWriter Total blocked: 789 Total waited: 616
Forum
11

find repeated records by JPQL

. The inner query in #1 contains GROUP BY / HAVING. The outer query in #1 contains the IN operator ... ) Then you doubt the relation between #1 and #3 !!!!!!   Indeed I don't get the point since in #3 there is no GROUP BY / HAVING. gzdillon ... (select id from TTT s group id having count(id)>1) I dont know how to do this using JPQL, but I use
Forum
11

Problem with distinct select, order by and equivalent alias/attribute path

is less restrictive, and will except the query above. However, in DISTINCT and GROUP BY queries it must follow ... when ordering the results of some projection when the order by expression is different (though logically ... _location "             + "order by s_location.id asc";         System.out.println("Working query
JDO Doc
11

javax.jdo.Query

: group - a comma-delimited list of expressions, optionally followed by the "having" keyword ... with a PersistenceManager. Multiple queries might be executed simultaneously by different threads ... , import statements, ordering and grouping specifications, result and result class, the range
JPA Doc
11

JPA 2 Annotations

JPA defines dozens of annotations that can be divided into the following groups: Annotations for JPA aware classes: Annotations for fields in JPA persistable classes: Annotations for additional JPA ... between a relational database and an object model and for direct SQL queries): These ORM annotations are silently ignored by ObjectDB.