package com.gkhy.huataiFourierSpecialGasMonitor.repository;
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import com.gkhy.huataiFourierSpecialGasMonitor.entity.GasCategory;
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import org.springframework.data.jpa.repository.JpaRepository;
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import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
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import org.springframework.data.jpa.repository.Query;
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import org.springframework.stereotype.Repository;
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import java.util.List;
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@Repository
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public interface GasCategoryRepository extends JpaRepository<GasCategory,Integer>, JpaSpecificationExecutor<GasCategory> {
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GasCategory findByMolecularFormula(String molecularFormula);
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@Query(value = "select t from GasCategory t where t.id <= 3")
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List<GasCategory> findGasCategoryForReport();
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}
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