How I can found out, which field refers to some column in database table that I need

This is my DTO class

package com.example.University.dto;

import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
public class FileDbDTO {
    private String name;
    private String type;
    private Long size;
    private String teacherName;
    private byte[] data;

    public FileDbDTO(String name, String type, Long size) {
        this.name = name;
        this.type = type;
        this.size = size;
    }
}

The feald teacherName refers to the column name of table Teacher. But when I write "techer" instead of it, шn didn't work. Each time I have to find by selection which field name will output the data I need from the linked tables.

Is it possible to somehow find out the right field name without having to run applications every time?

I use postgre DB

This is my teacher class

package com.example.University.model.people;


import com.example.University.model.FileDb;
import com.example.University.model.Task;
import com.example.University.model.subjects.Subject;
import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.ToString;

import javax.persistence.*;
import java.util.Set;

@Entity
public class Teacher extends Person {

    private String subject;

    @ManyToMany(mappedBy = "teacherSet")
    @JsonIgnore
    @ToString.Exclude
    private Set<Subject> subjectSet;

    @OneToMany(mappedBy = "teacher")
    @JsonIgnore
    @ToString.Exclude
    private Set<Task> tasks;

    @OneToMany(mappedBy = "teacher")
    @JsonIgnore
    @ToString.Exclude
    private Set<FileDb> fileDbs;

    public Teacher(String name, Integer age, String universityName, String subject, String type) {
        super(name, age, universityName, type);
        this.subject = subject;
    }

    public Teacher() {

    }

    public String getSubject() {
        return subject;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    @Override
    public String toString() {
        return super.toString() +
                "Teacher{" +
                ", subject='" + subject + '\'' +
                '}';
    }

    public void enrollTask(Task task) {
        tasks.add(task);
    }
}