mybatis一对多查询内层排序
意田天 人气:1mybatis一对多查询内层排序
<!--根据板块id查询所有主题->指标->维度--> <resultMap id="TitleDimensionMap" type="com.etouch.admincenter.bean.ZhmdDiagnosisTitleBean"> <id column="title_id" property="id"/> <result column="title_name" property="titleName"/> <collection property="diagnosisKpiBeanList" ofType="com.etouch.admincenter.bean.ZhmdDiagnosisKpiBean"> <id column="kpi_id" property="id"/> <result column="kpi_name" property="kpiName"/> <result column="kpi_type" property="kpiType"/> <result column="calculate_method" property="calculateMethod"/> <result column="is_add_description" property="isAddDescription"/> <result column="description_remind" property="descriptionRemind"/> <result column="input_description" property="inputDescription"/> <result column="kpi_industry_standard" property="kpiIndustryStandard"/> <result column="kpi_brand_standard" property="kpiBrandStandard"/> <result column="kpi_industry_standard_diff" property="kpiIndustryStandardDiff"/> <result column="kpi_brand_standard_diff" property="kpiBrandStandardDiff"/> <result column="input_description" property="inputDescription"/> <result column="kpi_description" property="kpiDescription"/> <collection property="dimensionBeans" ofType="com.etouch.admincenter.bean.ZhmdDiagnosisKpiDimensionBean"> <id column="kpi_dimension_id" property="id"/> <result column="diagnosis_id" property="diagnosisId"/> <result column="dimension_name" property="dimensionName"/> <result column="dimension_value" property="dimensionValue"/> </collection> </collection> </resultMap>
可设置多个排序规则,这样展示到前端页面时,解决每次打开页面显示顺序都不一样的问题
<select id="getDimensionOneStep" resultMap="TitleDimensionMap"> select zdt.id as title_id,zdt.title_name, zdk.id as kpi_id,zdk.kpi_name,zdk.kpi_type,zdk.calculate_method,zdk.is_add_description,zdk.description_remind,zdk.kpi_description, zdkd.id as kpi_dimension_id, zdkd.dimension_name,zdd.dimension_value, zdkpd.input_description from zhmd_diagnosis_title zdt left join zhmd_diagnosis_kpi zdk on zdk.diagnosis_title_id = zdt.id left join zhmd_diagnosis_kpi_dimension zdkd on zdkd.diagnosis_kpi_id = zdk.id left join zhmd_dimension_diagnosis zdd on zdd.dimension_id = zdkd.id and zdd.diagnosis_id = #{diagnosisId} left join zhmd_diagnosis_kpi_problem_desc zdkpd on zdkpd.kpi_id = zdk.id and zdkpd.diagnosis_id =#{diagnosisId} where zdt.diagnosis_model_id = #{modelId} order by zdt.create_date desc,zdk.create_date desc,zdkd.dimension_sort asc </select>
postman查询结果
mybatis多排序问题
在很多业务场景中,会有多排序问题,mybatis支持多排序,写法如下:
ORDER BY contract.contractCount DESC, reward.rewardTotal DESC, new_job.newJobCount DESC
这种写法是根据最左边的字段进行第一排序,如果第一排序字段有并列的,则根据第二字段再去排一次,依次类推。
以上为个人经验,希望能给大家一个参考,也希望大家多多支持。
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