Question

我通过遵循一些教程来从事Spring Boot项目。我无法解决上述问题，我尝试了一切。请帮我

Bean类

@Entity
@Table(name="flight")
public class Flight {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@Column(name = "Flight_Number")
private String flightNumber;

@Column(name = "Operating_Airlines")
private String operatingAirlines;

@Column(name = "Departure_City")
private String departureCity;

@Column(name = "Arrival_city")
private String arrivalCity;

@Column(name = "Date_Of_Departure")
private Date dateOfDeparture;

@Column(name = "Estimated_Departure_Time")
private Timestamp estimatedDepartureTime;
//getters and setters
}}

存储库

public interface FlightRepository extends JpaRepository<Flight, Long> {

@Query(value = "select * from flight f where f.departureCity =:departureCity and f.arrivalCity =:arrivalCity and f.dateOfDeparture =:dateOfDeparture ", nativeQuery = true)
List<Flight> findFlights(@Param("departureCity") String from, @Param("arrivalCity") String to,
        @Param("dateOfDeparture") Date departureDate);
}

数据库

create table flight
(
Id int not null auto_increment,
Flight_Number varchar(20) not null,
Operating_Airlines varchar(20) not null,
Departure_City varchar(20) not null,
Arrival_city varchar(20) not null,
Date_Of_Departure date not null,
Estimated_Departure_Time timestamp default current_timestamp,
primary key (Id)
)

我在“ where子句”中得到了“ f.departureCity”未知列。

Answer 1

在这种情况下，您应该像将查询直接写入数据库一样编写查询，因为@Query标记为本机。因此，请参考脚本中定义的字段以创建表。

'f.Departure_City'而不是'f.departureCity'，依此类推...

Answer 2

我认为您必须更改查询中的文件名并再次执行

因此将 dateOfDeparture 更改为 Date_Of_Departure 就可以了

java.sql.SQLSyntaxErrorException：“ where子句”中的未知列“ f.departureCity”

2 个答案: