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Jan 21st, 2018
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  1. public class A{
  2.     private Integer id;
  3. }
  4.  
  5. public class B{
  6.     private Integer id;
  7.     private A a;
  8.     private BigDecimal jml;
  9. }
  10.  
  11.  
  12. HQL : select sum(b.jml) from B b where b.a.id = :idnyaA group by b.a.id
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