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| Viewing: https://en.wikipedia.org/wiki/Java_Persistence_Query_Language |
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| References |
| See also |
| External links |
| Jakarta Persistence Query Language | |
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| OS | Cross-platform |
| Website | jakarta.ee/learn/docs/jakartaee-tutorial/current/persist/persistence-querylanguage/persistence-querylanguage.html |
| Influenced by | |
| SQL, Hibernate | |
The Jakarta Persistence Query Language (JPQL; formerly Java Persistence Query Language) is a platform-independent object-oriented query language defined as part of the Jakarta Persistence (JPA; formerly Java Persistence API) specification.
JPQL is used to make queries against entities stored in a relational database. It is heavily inspired by SQL, and its queries resemble SQL queries in syntax, but operate against JPA entity objects rather than directly with database tables.
In addition to retrieving objects (SELECT queries), JPQL supports set based UPDATE and DELETE queries.
SELECTaFROMAuthoraORDERBYa.firstName,a.lastNameTo retrieve the list of authors that have ever been published by XYZ Press: