使用條件休眠嵌套查詢

Question

是否可以創建以下sql生成條件：

select name from (select distinct name from person) as aliasname  order by lower(name);

這里有兩個SQL-

1. select distinct name from person

2. select name from <output of 1> as aliasname order by lower(name)

我想創建標准，然后執行criteria.list()

Answer 1

我認為，這將滿足您的需求：

criteria.addOrder(Order.asc("name").ignoreCase())
        .setProjection(Projections.distinct(Projections.property("name")))
        .list();

或者，此條件使用帶有名稱投影的DetachedCriteria作為子查詢：

DetachedCriteria distinctNamesCriteria = DetachedCriteria.forClass(Person.class);
distinctNamesCriteria.setProjection(Projections.distinct(Projections.property("name")));

criteria.add(SubQueries.propertyIn("name", distinctNamesCriteria))
        .addOrder(Order.asc("name").ignoreCase())
        .list();

Answer 2

我沒有答案，但是為什么要第二選擇？

SELECT DISTINCT NAME FROM PERSON AS ALIASNAME ORDER BY LOWER(NAME)

將返回相同的數據。