1.count() 2.existById() 3.saveAll() 4.mybatis没有的findAllById(List) http://4.in查询 5.Sort.by()排序 6.1.智能字段匹配 6.2.原生字段匹配sql 7.条件查询@Query 8.1.条件删除 8.1.条件删除原生sql 9.原生sql更新(save) 10.分页 4.@DynamicUpdate 说明 现象:为什么同时注解DynamicInsert和DynamicUpd...
1、count相关,返回值为int 或 long int countByDishHourAndRestId(int hour, long restId); int countaaaByDishHourAndRestId(int hour, long restId); int countaaasByDishHourAndRestId(int hour, long restId); int countAllByDishHourAndRestId(int hour, long restId); 1. 2. 3. 4. 上面这4...
int countAllByDishHourAndRestId(int hour, long restId); 上面这4个方法是一样的,对应的SQL如下: 1 select count(id) from aaa where dishHour=? and restId=? 下面这种定义,没有意义,知晓一下就好: 1 int countDistinctByDishHourAndRestId(int hour, long restId); 对应SQL如下,如果表中有主键,功...
countQuery = "select COUNT(*) from spring.area_info where id REGEXP ?1") Page<AreaInfoEntity> findAllByIdTest(String id, Pageable pageable); } Hibernate: select * from spring.area_info where id REGEXP ? /* #pageable# */ order by ordernum desc Hibernate: select COUNT(*) from spring...
假如我们要查询当前所有的人员信息并实现分页的话,你可以按照下面这种方式来做。可以看到,为了实现分页,我们在@Query注解中还添加了countQuery属性。 @Query(value = "select new github.snailclimb.jpademo.model.dto.UserDTO(p.name,p.age,c.companyName,s.name) " + ...
SpringJPA 直接实现count(*) 刚开始使用JPA时,基本都依赖@query(SQL)注解aTDzpQw通过原生sql来实现 根据编号统计条数: 方法一 @Query(" select count(t) from FollowerInfo t where investUserId = :invUserId") Integer findFollowerNumberByInvUserId(aTDzpQw@Param("invUserId") Long invUserId); ...
分页查询 Page<S> findAll(Example<S> example, Pageable pageable) 根据id查询 findOne() 根据实体类属性查询: findByProperty (type Property); 例如:findByAge(int age) 删除void delete(T entity) 计数 查询 long count() 或者 根据某个属性的值查询总数 countByAge(int age) ...
Spring Data JPA 支持根据实体的某个属性实现数据库操作,主要的语法是 findByXX、 readAByXX、queryByXX、 countByXX、 getByXX 后跟属性名称。 利用这个功能仅需要在定义的 Repository 中添加对应的方法名即可,无需具体实现完整的方法,使用时 Spring Boot 会自动动帮我们实现对应的sql语句。
publicinterfaceJpaSpecificationExecutor<T>{Optional<T>findOne(@Nullable Specification<T>var1);List<T>findAll(@Nullable Specification<T>var1);Page<T>findAll(@Nullable Specification<T>var1,Pageable var2);List<T>findAll(@Nullable Specification<T>var1,Sort var2);longcount(@Nullable Specification<T>...
Each player is allowed to know at all times how many cards are in the other player's hand (but not of course what the cards are), and you must answer truthfully if asked how many cards you have. However, it is forbidden to count the remaining cards in the stock. Also, players are...