Question

我有什么
我正在做春季启动项目 2.以下是两个域

a）

@Entity
@Table(name="oc_country")  
public class Country {  
    @Id  
    @GeneratedValue(strategy=GenerationType.AUTO)  
    @Column(name="country_id", nullable=false, length=11)  
    private int countryId;  
    @Column(name="name",nullable=false,length=128)  
    private String name;  
    @Column(name="iso_code",nullable=false,length=2)  
    private String isoCode;  
    @Column(name="phonecode",nullable=false,columnDefinition="int(5)")  
    private int phoneCode;          
}

b）中

@Entity  
public class ExchangeCountry{  
    @Id    
    @GeneratedValue(strategy=GenerationType.AUTO)    
    private Long id;    
    @Column(name="country_id", nullable=false, length=11)    
    private int countryId;    
    private String fiatCurrency;    
    private boolean isDeleted=false;    
    @Column()     
    @Temporal(TemporalType.TIMESTAMP)    
    private Date createdDate = new Date();    
    @Column()     
    @Temporal(TemporalType.TIMESTAMP)  
    private Date updatedDate = new Date();  
    private Boolean isGlobalExchange=false;  

}

使用mysql作为数据库
当我写下mysql查询时，我得到了结果查询： - ＆GT; select ex.country_id, (select name from oc_country c where c.country_id=ex.country_id) as countryName from exchange_country ex;

我想要什么
1.如何在两个实体中用JpaRepository（spring data jpa）编写select子句子查询？
2.有没有办法从jpa（spring data jpa）或其他概念写上面的mysql查询？

由于

如何编写，用spring数据jpa选择子句子查询？

0 个答案: