Pro JPA 2 in Java EE 8: An In-Depth Guide to Java Persistence APIs

© Mike Keith, Merrick Schincariol, Massimo Nardone 2018

Mike Keith, Merrick Schincariol and Massimo NardonePro JPA 2 in Java EE 8https://doi.org/10.1007/978-1-4842-3420-4_8

8. Query Language

Mike Keith¹ , Merrick Schincariol² and Massimo Nardone³

(1)

Ottawa, Ontario, Canada

(2)

RR 3, RR 3, Almonte, Ontario, Canada

(3)

Helsinki, Finland

 

The Java Persistence API provides two methods for querying entities—the Java Persistence query language (JPQL) and the Criteria API.

The Java Persistence Query Language (JP QL) is the string-based standard query language of JPA. It is a portable query language designed to combine the syntax and simple query semantics of SQL with the expressiveness of an object-oriented expression language. Queries written using this language ...