Jakarta Persistence Query Language: Difference between revisions

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The '''Jakarta Persistence Query Language''' ('''JPQL'''; formerly Java Persistence Query Language) is a platform-independent [[object-oriented]] [[query language]]{{sfn|Bauer|King|Gregory|2016}}{{rp|loc=§12|p=284}} 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,{{sfn|Bauer|King|Gregory|2016}}{{rp|loc=§1.3|p=17}}, but operate against JPA entity objects rather than directly with database tables.{{sfn|Bauer|King|Gregory|2016}}{{rp|loc=§2.2.3|p=26}}

In addition to retrieving objects (<code>SELECT</code> queries), JPQL supports set based <code>UPDATE</code> and <code>DELETE</code> queries.