如何在不使用 Distinct 的情况下删除 SQL 查询中的重复项？

下面的查询结果有重复。我的问题是如何摆脱subTaskName不使用重复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

使用此链接查看图像 https://i.stack.imgur.com/zLmvW.png

在 where 子句之后包括：GROUP BYtasks.name