Question

I´m trying to get accustomed to JPQL, but i´m already stuck. How does this:

SELECT * FROM Table_a INNER JOIN Table_b USING (Table_bID) Where Table_b.Column_a LIKE 'somestring'

translate to JPQL ? I would very much appreciate any help.

Answer 1

select a from EntityMappedToTableA 
inner join fetch a.entityMappedToTableB b
where b.fieldMappedOnColumnA like :someString

For this to work, you must have a relationship (I assume it is a ManyToOne, since there seems to be several rows in table A which have the ID of table B) from EntityMappedToTableA to EntityMappedToTableB :

@Entity
public class EntityMappedToTableA {
    @ManyToOne
    @JoinColumn(name = "Table_bID")
    private EntityMappedToTableB entityMappedToTableB;

    // ...
}