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                            ## 全查
~~~
//類SQL語句,不是真的SQL語句
Query          qr   = entityManager.createQuery("from Customer");
List<Customer> list = qr.getResultList();

System.out.println(list);
~~~

## 條件查
占位符從1開始的,hibernate是從0開始的:
~~~
//類SQL語句,不是真的SQL語句
Query qr = entityManager.createQuery("from Customer where cust_name like  ?");
qr.setParameter(1, "%俠%");

List<Customer> list = qr.getResultList();
System.out.println(list);
~~~

## 分頁查
~~~
Query qr = entityManager.createQuery("from Customer");
qr.setFirstResult(2);
qr.setMaxResults(3);

List<Customer> list = qr.getResultList();

for (Customer c : list) {
    System.out.println(c);
}
~~~

## 聚合查詢
~~~
Query qr = entityManager.createQuery("select count(*) from Customer");
Object singleResult = qr.getSingleResult();
System.out.println(singleResult);
~~~

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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