SQL查询中将某些符合条件的行置顶

业务需求：评论功能--根据当前登录用户显示当前用户的所有评论且置于结果集的顶部。

//例子
SELECT
    AppId,
    du.UserName AS UserName,
    CreateTime,
    Score,
    COMMENT,
    Id 
FROM
    ds_applicationcomment dc,
    ds_user du 
WHERE
    dc.UserId = du.UserId 
    AND AppId = '1' 
ORDER BY
    CASE when dc.UserId = 'c09d98b4-fc9d-4fea-869f-90b79ded770c' THEN 0 ELSE 1 END,
    CreateTime DESC

//核心SQL
CASE when `所查询条件` = '当前用户ID' THEN 0 ELSE 1 END