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Java Persistence QL  RSS feed

 
Pradeep bhatt
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How does Java Persistence QL differ from EJB QL ? Is it close to SQL ?
 
Christophe Verré
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Have a look at chapter 6 (downloadable sample).

Java Persistence Query Language significantly extends EJB QL, eliminating many weaknesses of the previous versions while preserving backwards compatibility. The following features are available above and beyond EJB QL:
� Single and multiple value result types
� Aggregate functions, with sorting and grouping clauses
� A more natural join syntax, including support for both inner and outer joins
� Conditional expressions involving subqueries
� Update and delete queries for bulk data changes
� Result projection into non-persistent classes
 
Pradeep bhatt
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Can you pass the link ?
 
Christophe Verré
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http://www.apress.com/book/bookDisplay.html?bID=10093
 
Pradeep bhatt
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Thanks
 
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