How do I remove duplicates in an SQL query without using Distinct?

问题

There are duplicates in the results of the query below. My question is how to get rid of subTaskName duplicates without using distinct?

SELECT  tasks.priority, (SELECT tasks.name FROM tasks WHERE tasks.taskid ='11377') AS taskName,
        tasks.name AS subTaskName,u.name,tasks.deadline,tasks.created,a.duration AS durata,tasks.parentID,tasks.userid ,tasks.finished,
        tasks.estimated,tasks.taskid,tasks.section,tasks.tags
        FROM tasks 
        INNER JOIN users u 
        ON tasks.assignerid = u.userid
        INNER JOIN activities a 
        ON tasks.parentID = a.taskid
        WHERE tasks.parentID='11377' 
        ORDER BY tasks.taskid
        DESC

Use this link to see the image

回答1:

After where clause include: GROUP BY tasks.name

来源：https://stackoverflow.com/questions/21160200/how-do-i-remove-duplicates-in-an-sql-query-without-using-distinct