用于查找不同值计数的休眠标准

Question

我有如下sql查询，需要获取对应的hibernate条件查询

SELECT COUNT(DISTINCT employee_id) FROM erp_hr_payment WHERE payment_id IN(
SELECT payment_id FROM erp_hr_payment_collection WHERE payment_id IN(
SELECT payment_id FROM erp_hr_payment_collection WHERE payment_id IN(
SELECT payment_id FROM erp_hr_payment
 WHERE for_month BETWEEN '2013-04-01' AND '2014-03-31' AND arrear_flag=0
) AND element_name='EPF' ) AND element_name='EPFV');

Answer 1

从大多数内部查询开始创建相对DetachedCriteria 并使用Subqueries.in() 附加到外部查询。
对于count(distinct)，请使用Projections.countDistinct(propertyName)。 享受吧。

Answer 2

• 创建分离标准。每个内部查询一个。
• 将分离的标准放在主要标准的“in”子句中

• 使用 countDistinct 投影来获得不同的员工数量

  DetachedCriteria erp_hr_paymentDetachedCriteria = DetachedCriteria.forClass(Erp_hr_payment.class,"erp_hr_payment");
  erp_hr_paymentDetachedCriteria.setProjection(Property.forName("payment_id"));
  
  Criteria erp_hr_paymentMainCriteria = session.createCriteria(erp_hr_payment.class, "pogHeader");
  erp_hr_paymentMainCriteria.setProjection(Projections.projectionList().add(Projections.alias(Projections.countDistinct("erp_hr_payment.employee_id"), "distinctEmployeeCount")));
  erp_hr_paymentMainCriteria.add(Property.forName("erp_hr_payment.payment_id").in(erp_hr_paymentDetachedCriteria));
  erp_hr_paymentDetachedCriteria.list(); //Will give you your result