I have the following java list of UserRecords objects that are grouped by user_name. I want to be able to break down this list into small batches of 5 records if a user has more than 5 records. Here’s the result of my user group: Since Jane Doe has more than 5 records, I would like her results to be
Tag: group-by
Java Streams – group-by and return a Nested Map
my data is like this, my goal is put every unitId and value into a map like this, I already figure out two ways to achieve that, here is my code, and, First one more like write the processing manually, second one uses temporary lists which may not be necessary. Is there any direct or simple way to do this,
How to join two tables with a group query using Hibernate (5.4) Criteria?
This is my Project Entity: ( Project.java ) This is my Task Entity: ( Task.java ) Desired DTO: ( ProjectWithSumOfTaskDto.java ) Table structure in database: tasks: id title description project_id projects: id name description The main question: What I need now is to join the “projects” table and “tasks” table grouping by the “project_id” column. And obtain List as output.