15.6. Statement types

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Both HQL and JPQL allow `SELECT`, `UPDATE` and `DELETE` statements to be performed.
HQL additionally allows `INSERT` statements, in a form similar to a SQL `INSERT FROM SELECT`.

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Care should be taken as to when a `UPDATE` or `DELETE` statement is executed.

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Caution should be used when executing bulk update or delete operations because they may result in
inconsistencies between the database and the entities in the active persistence context. In general, bulk
update and delete operations should only be performed within a transaction in a new persistence con
text or before fetching or accessing entities whose state might be affected by such operations.

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&#8212; Section 4.10 of the JPA 2.0 Specification
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