About GROUP BY
GROUP BY and HAVING clauses
Explains how to use the GROUP BY and HAVING clauses in a JPA/JPQL query. The GROUP BY clause enables grouping of query results. A JPQL query with a GROUP BY clause returns properties of generated groups instead of individual ...
JPA Query Structure (JPQL / Criteria)
Explains the structure of a JPQL query, which consists of 6 clauses: SELECT, FROM, WHERE, GROUP BY, HAVING, ORDER BY.... ... [ WHERE ... ] [ GROUP BY ... [ HAVING ... ] ] [ ORDER ...
ORDER BY clause (JPQL / Criteria API)
Explains how to use the ORDER BY clause in a JPA/JPQL query. The ORDER BY clause specifies a required order for the query results. Any JPQL query that ... Order Direction (ASC, DESC) Grouping (GROUP BY) Order ORDER BY in Criteria Queries ... c ORDER BY c . name DESC Grouping (GROUP BY) Order The ORDER BY clause is always the last in the query ...
Chapter 4 - JPA Queries (JPQL / Criteria)
Describes the Java Persistence Query Language (JPQL), the JPA Criteria API, and explains how to use queries in JPA.... of a JPQL query (and a criteria query) is explained by describing the main clauses of JPQL queries (SELECT, FROM, WHERE, GROUP BY, HAVING, ORDER BY): JPA Query Structure (JPQL / ...
Step 1: Create a Maven Web Project
Explains how to create a NetBeans Web Maven project with Spring and ObjectDB/JPA support. 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 ... Guestbook ) and select Java EE 5. Enter Maven Group Id (e.g. com.objectdb.tutorial.spring ). Enter Maven Version (e.g. ...
Step 1: Create a Maven Web Project
Explains how to create a Eclipse Web Maven project with Spring and ObjectDB/JPA support. 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 ... artifact list and click Next . Enter Group Id (e.g. Guestbook ), Artifact Id (e.g. Guestbook ), Version ...
Help with JPA2 Criteria and conditional operator grouping
Hi, I'm getting a little trouble performing a query as per the way I had it set up on eclipselink. Essentially, the query I'm trying to generate is: SELECT $1 FROM Company $1 WHERE (($1.companyId=:p1) AND ($1.conditionOne=true)) AND (($1.conditionTwo=false) OR ($1.conditionThree=false)) From the JPA2 criteria: ... Avoid overflow of published source code examples by breaking long lines . You may mark in paragraph code words ... class names) with the code style (can be applied by ctrl + D). Long stack traces (> 50 lines) and complex source ...
javax.persistence.criteria.CriteriaQuery
The CriteriaQuery interface defines functionality that is specific to top-level queries.(Interface of JPA)
Grouping by date()
Hi, For some time now we can use date and time function in queries to extract part of date time (from documentation): YEAR({d '2011-12-31'}) is evaluated to 2011. MONTH({d '2011-12-31'}) is evaluated to 12. DAY({d '2011-12-31'}) is evaluated to 31. HOUR({t '23:59:00'}) is evaluated to 23. MINUTE({t '23:59:00'}) is evaluated to 59. SECOND({t '23:59:00'}) is evaluated to 0. ... is evaluated to 0. Quite often I have to group by date(). For few queries I was concatenating 'date' from ... There is only one small problem with new version. When you group by date() there are two days per day. I mean group by divides each day ...
Group by date / time
Hi, I'm trying to create reporting query that will return entities grouped by year / mont / day. Each entity has it's own field that holds java.lang.Date. There is no function like YEAR(), MONTH() or DAY() in ODB. So, how to build queries similar to something like this: SELECT COUNT(id) FROM stats WHERE YEAR(record_date) = 2009 GROUP BY YEAR(record_date), MONTH(record_date) or maybe something like this: ... create reporting query that will return entities grouped by year / mont / day. Each entity has it's own field that holds ... YEAR ( record_date ) = 2009 GROUP BY YEAR ( record_date ) , MONTH ( record_date ...
