小编dam*_*ter的帖子

我定义了以下方法：

@Query("SELECT AVG(total) FROM (SELECT COUNT(t.name) total FROM DataTable t GROUP BY DATE(actiontime)) result")
Long countAvg();

但是它会导致此错误：

Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected     token: ( near line 1, column 24 [SELECT AVG(total) FROM (SELECT     COUNT(t.name) total FROM backend.DataTable t GROUP BY     DATE(actiontime)) result]

但以下 SQL 工作正常：

SELECT AVG(total) FROM (SELECT COUNT(NAME) total FROM DATA_TABLE GROUP BY DATE(actiontime)) result 

如果我理解正确，JPQL 有子查询问题。我应该如何创建这种查询呢？