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 ...
分组GROUP BY having HAVING 关键词 orderBy 排序ORDER BY orderAsc ASC 排序 ORDER BY orderDesc DESC 排序 ORDER BY exists EXISTS 条件语句 notExists NOT EXISTS 条件语句 between BETWEEN 条件语句 notBetween NOT BETWEEN 条件语句 addFilter 自由拼接 SQL last 拼接在最后,例如:last("LIMIT 1") 注意! xx...
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...
@Test public void testLambdaQueryOfOr_And() { LambdaQueryWrapper<UserEntity> lqw = Wrappers.lambdaQuery(); lqw.eq(UserEntity::getSex, 0L) .and(wrapper->wrapper.eq(UserEntity::getUserName,"dunzung") .or().ge(UserEntity::getAge, 50)); List<UserEntity> userList = userMapper.selectList...
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"/> ...
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(); ...
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 (0) >1"); } ...
* 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...
https://www.jianshu.com/p/613... https://blog.csdn.net/Solitud... https://blog.csdn.net/weixin_... https://blog.csdn.net/weixin_... 作者:猿芯 来源:https://www.toutiao.com/i6951... javamybatis-pluslambda程序员后端 本文系转载,阅读原文 ...