private Map<String, Double> queryWeight() { QueryWrapper<TagWeight> wrapper = new QueryWrapper<>(); wrapper.lambda().likeRight(TagWeight::getTagType, "101109"); List<TagWeight> list = tagWeightService.list(wrapper); if (CollectionUtils.isEmpty(list)) { return Maps.newHashMap(); } return...
orderByDesc(R... columns); // 等价于 ORDER BY 字段, ... DESC, 例: orderByDesc("id", "name") ---> order by id DESC,name DESC having(String sqlHaving, Object... params); // 等价于 HAVING ( sql语句 ), 例: having("sum(age) > {0}", 11) ---> having sum(age) > 11 ...
orderByDesc(R... columns); // 等价于 ORDER BY 字段, ... DESC, 例: orderByDesc("id", "name") ---> order by id DESC,name DESC having(String sqlHaving, Object... params); // 等价于 HAVING ( sql语句 ), 例: having("sum(age) > {0}", 11) ---> having sum(age) > 11 ...
wrapper.orderByDesc("age", "name"); // 16.分组查询,用于按照指定字段进行分组查询。 QueryWrapper<User> wrapper = new QueryWrapper<>(); wrapper.select("age", "count(*)").groupBy("age"); // 17.HAVING 子句查询,用于筛选分组查询结果。 QueryWrapper<User> wrapper = new QueryWrapper<>(); wrap...
信息来源参数只传了一个String dsCode=queryForm.getDsCode();String dsSourceName=queryForm.getDsSourceName();String dsNewsColumns=queryForm.getDsNewsColumns();if(!StringUtil.isEmpty(dsCode)){lqw.likeRight(Ds::getDsCode,SqlUtil.escapeLike(dsCode));lqw.groupBy(Ds::getDsCode).having("count (...
利用mybatis 的 collection 标签,可以在每次查询文章主体同时通过 queryparaminstancelist 级联查询出关联表数据。 <resultMap id="BaseResultMap" type="com.unicom.portal.pcm.entity.ArticleEntity"> <id column="id" jdbcType="BIGINT" property="id"/> ...
having(String sqlHaving, Object... params); // 等价于 HAVING ( sql语句 ), 例: having("sum(age) > {0}", 11) ---> having sum(age) > 11 实现的java代码参考如下通过分组来查询分页的使用代码 @DataSource(DataSourceType.HW_BUSINESS) public IPage selectDistinctDsByPage(DsQueryForm queryForm...
wrapper.lambda().eq(BannerItem::getBannerId, id); List<BannerItem> bannerItems = bannerItemMapper.selectList(wrapper); LambdaQueryWrapper 为了简化lambda的使用,我们可以改写成LambdaQueryWrapper构造器,语法如下: LambdaQueryWrapper<BannerItem> wrapper =newQueryWrapper<BannerItem>().lambda(); ...
* select avg(age)avg_age,min(age) min_age,max(age) max_age from user group by manager_id having sum(age)<500 */ @Test public void selectByWrapperMaps2() { QueryWrapper<User> queryWrapper = new QueryWrapper<>(); queryWrapper.select("avg(age) avg_age", "min(age) min_age", "max...
利用mybatis的collection标签,可以在每次查询文章主体同时通过queryparaminstancelist级联查询出关联表数据。 代码语言:javascript 复制 <resultMap id="BaseResultMap"type="com.unicom.portal.pcm.entity.ArticleEntity"><id column="id"jdbcType="BIGINT"property="id"/><collection property="paramList"column="id"sel...