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jpaリポジトリ内でSQLを作成する方法

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JPAリポジトリ内で用意されているメソッド以外を使用する方法

sample.java
import java.util.Optional;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.stereotype.Repository;

@Repository
public interface dailyEvRepository extends JpaRepository<dailyEv, Long> {

    @Query(value = "SELECT * FROM SAMPLE WHERE id = ?1", nativeQuery = true)
    Optional<sample> findByIdCustom(Integer id);
}

注目箇所

@Query(value = "SELECT * FROM SAMPLE WHERE id = ?1", nativeQuery = true)

?1には使用する際の引数の1つ目が入ります。
nativeQuery = trueにすることでJPQLではなくSQLを使用可能になります。

例としては

Optional<Sample> sampleData = repository.findByIdCustom(1); 

だとSAMPLEテーブル内のIDが1のデータを取得します。

以上

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