mybatisplus querywapper groupy

The MyBatis Plus QueryWrapper class does not have a direct method for grouping data. However, you can achieve grouping in MyBatis Plus by using the "groupBy" method of the QueryWrapper object.

Here is an example of how you can use the "groupBy" method to group data:

QueryWrapper<User> queryWrapper = new QueryWrapper<>();
queryWrapper.select("age, count(*) as count")
            .groupBy("age")
            .having("count > 1");

List<User> userList = userMapper.selectList(queryWrapper);

In the above example, we are using the "groupBy" method to group the data by the "age" column. We are also using the "select" method to specify the columns to be selected, and the "having" method to filter the grouped data based on the count.

Note that the "groupBy" method takes a variable number of arguments, so you can specify multiple columns to group by if needed