如何編寫具有多個條件和其他關係的子查詢的jpql查詢

Question

我想通過JPQL觸發以下查詢。我是JPA的新手和學習JPQL，但堅持在此查詢。

SELECT * FROM users 
WHERE userid NOT IN (SELECT userid FROM applicants) 
AND gender = 'MALE' AND (firstname like '%R%' OR lastname like '%S%'); 

這裏性別和名稱參數是動態傳遞的，但在這裏我保持靜態。

我的課表摘錄如下： 這是我的用戶類
用戶類別：

@Table(name = "users") 
public class User{ 

@Id 
@GeneratedValue 
private long userId; 

@Column(unique = true, nullable = false) 
private String email; 

private String firstName; 

private String middleName; 

private String lastName; 

private String gender; 

private Timestamp appliedOn; 
} 

申請人類與用戶類OneToOne關係和連接列用戶ID。

申請人類：

@Entity 
@Table(name = "applicants") 
public class Applicant{ 

@Id 
private long applicantId; 

@OneToOne 
@JoinColumn(name = "userId") 
private User user; 

@ManyToOne 
@JoinColumn(name = "subCourseId") 
private SubCourse course; 

@ManyToOne 
@JoinColumn(name = "collegeId") 
private College college; 
} 

Answer 1

是不是你想達到與左達到什麼JOIN：

SELECT * FROM users 
LEFT JOIN applicants ON users.userid = applicants.userid 
WHERE applicants.userid IS NULL 
AND gender = 'MALE' AND (firstname like '%R%' OR lastname like '%S%'); 

還是一個NOT IN：

SELECT * FROM users 
WHERE userid NOT IN (SELECT userid FROM applicants) 
AND gender = 'MALE' AND (firstname like '%R%' OR lastname like '%S%'); 

如果是的，你應該從那裏開始找到你的答案。對於SQL

SELECT * FROM users 
WHERE userid NOT IN (SELECT userid FROM applicants) 
AND gender = 'MALE' AND (firstname like '%R%' OR lastname like '%S%'); 

Answer 2

JPQL查詢將是未來：

String jpql = "SELECT us FROM User us WHERE us.userId NOT IN (SELECT appl.user.userId FROM Applicant appl) AND us.gender = ?1 AND (us.firstName LIKE ?2 OR us.lastName LIKE ?3)"; 
Query query = entityManager.createQuery(jqpl); 
query.setParameter(1, "MALE"); 
query.setParameter(2, "%R%"); 
query.setParameter(3, "%S%"); 
query.getResultList();