About DISTINCT
SELECT clause (JPQL / Criteria API)
Explains how to use the SELECT clause and projections in a JPA/JPQL query.... Classes (Constructor Expressions) SELECT DISTINCT SELECT in Criteria Queries ... built faster and they consume less memory. SELECT DISTINCT Queries that use projection may return duplicate results. For ...
GROUP BY and HAVING clauses
Explains how to use the GROUP BY and HAVING clauses in a JPA/JPQL query.... covers the following topics: GROUP BY as DISTINCT (no Aggregates) GROUP BY with Aggregate Functions ... in Criteria Queries GROUP BY as DISTINCT (no Aggregates) The following query groups all the countries ...
distinct(distinct)
Specify whether duplicate query results will be eliminated.(Method of javax.persistence.criteria.CriteriaQuery)
distinct(distinct)
Specify whether duplicate query results will be eliminated.(Method of javax.persistence.criteria.AbstractQuery)
distinct(distinct)
Specify whether duplicate query results will be eliminated.(Method of javax.persistence.criteria.Subquery)
Issue with DISTINCT Select
It is getting more and more frustrating :( We've introduced distinct select instead of regular selection in our code (no changes else) and suddenly receive invalid identifiers in queries exceptions in various queries. Here's the stacktrace: ... getting more and more frustrating :( We've introduced distinct select instead of regular selection in our code (no changes else) and ... Invalid order expression '$3' for distinct results at com.objectdb.o.MSG.d(MSG.java:61) at ... hi, Well, the query works perfect without using distinct select so I doubt its an issue in our query. Here it goes: ...
Multi selection and distinct in a criteria query
hi, How can I realize multi selection with the criteria api concerning distinct? I.e. doing something like SELECT DISTINCT $1, $2 wouldn't work because I do only have something like criteria.multiselect(...) and nothing like builder.distinct(selection) so that I could do something like criteria.multiselect(builder.distinct($1), $2)... ?? Alex ... I realize multi selection with the criteria api concerning distinct? I.e. doing something like SELECT DISTINCT $1, $2 wouldn't work because I do only have something like ...
Distinct Error
Hi, I'm getting a NullPointerException thrown on using DISTINCT. The query works fine if I don't have distinct. However thats NOT a solution as the code generating the query is used for other queries, and some of them do need the distinct. Its only a simple query: QUERY: SELECT DISTINCT $1 FROM CDI $1 JOIN $1.attributeList $2 WHERE ($2.name='firstname') AND ($2.valueAsString='Alex') ... I'm getting a NullPointerException thrown on using DISTINCT. The query works fine if I don't have distinct. However thats NOT a solution as the code generating the query is used ...
countDistinct(x)
Create an aggregate expression applying the count distinct operation.(Method of javax.persistence.criteria.CriteriaBuilder)
javax.persistence.criteria.Subquery
The Subquery interface defines functionality that is specific to subqueries.(Interface of JPA)
