优化sql select cir.ID, cir.NAME, mebm.type, msg.persion_num, artic.TITLE AS ARTICLE_TITLE, ( CASE WHEN top_msg.top_id IS NOT NULL THEN 'true' ELSE 'false' END ) AS is_top from CIRLE_GROUP cir LEFT JOIN GROUP_MEMBER mebm on cir.ID = mebm.GROUP_ID LEFT JOIN(select gro.ID, gro.NAME, COUNT(*) as persion_num from CIRLE_GROUP gro LEFT JOIN GROUP_MEMBER meb on gro.ID = meb.GROUP_ID GROUP BY gro.ID, gro.NAME) msg on msg.ID = cir.ID LEFT JOIN(SELECT art_msg.TITLE, art_msg.ID FROM (SELECT art.TITLE, cl.id, ROW_NUMBER() OVER ( PARTITION BY cl.id ORDER BY art.PUBLISH_TIME DESC ) AS num FROM CIRLE_GROUP cl INNER JOIN ARTICLE art ON cl.id = art.GROUP_ID where art.STATUS = '1' and art.IS_CLOSE = '0' and art.DELETE_FLAG = '0') art_msg WHERE art_msg.num = 1) artic on artic.ID = cir.ID LEFT JOIN(select ci.id, top.id as top_id, top.UPDATED_TIME from CIRLE_GROUP ci INNER JOIN GROUP_TOP top on ci.ID = top.GROUP_ID where top.USER_ID = #{pageDto.userId} and top.DELETE_FLAG = '0') top_msg on cir.ID = top_msg.id where mebm.USER_ID = #{pageDto.userId} and cir.STATUS = '0' and cir.IS_DISMISS = '0' and cir.IS_ENABLE = '1' and cir.DELETE_FLAG = '0' order by case when top_msg.top_id is not null then top_msg.top_id else '1' end desc, top_msg.UPDATED_TIME desc, mebm.TYPE asc, mebm.JOIN_TIME desc

为了优化这个 SQL 查询，可以考虑以下几个方面：

1. 索引优化：确保相关的表上有适当的索引，以加快查询速度。对于经常被使用的列，可以考虑创建索引来提高查询性能。

2. 子查询优化：可以尝试将一些子查询转换为连接操作，以减少查询的复杂度和开销。比如将第一个左连接子查询 msg 转换为一个连接操作。

3. 冗余条件移除：检查 WHERE 子句中的条件，确保只包含必要的条件。移除不必要的冗余条件可以减少查询的复杂度。

4. CASE 表达式优化：对于 CASE 表达式中使用的条件，可以考虑使用更简洁的写法，以提高查询效率。

5. 分页优化：如果查询结果需要分页，可以考虑使用 LIMIT 或者 ROW_NUMBER() 函数进行分页，以减少返回的数据量。

最终优化后的 SQL 查询可能如下所示（注意：这只是一个示例，具体优化方式需要根据实际情况进行调整）：

SELECT cir.ID, cir.NAME, mebm.type, msg.persion_num, artic.TITLE AS ARTICLE_TITLE,
  (CASE WHEN top_msg.top_id IS NOT NULL THEN 'true' ELSE 'false' END) AS is_top
FROM CIRLE_GROUP cir
LEFT JOIN GROUP_MEMBER mebm ON cir.ID = mebm.GROUP_ID
LEFT JOIN (
  SELECT gro.ID, gro.NAME, COUNT(*) AS persion_num
  FROM CIRLE_GROUP gro
  LEFT JOIN GROUP_MEMBER meb ON gro.ID = meb.GROUP_ID
  GROUP BY gro.ID, gro.NAME
) msg ON msg.ID = cir.ID
LEFT JOIN (
  SELECT art_msg.TITLE, art_msg.ID
  FROM (
    SELECT art.TITLE, cl.id,
      ROW_NUMBER() OVER (PARTITION BY cl.id ORDER BY art.PUBLISH_TIME DESC) AS num
    FROM CIRLE_GROUP cl
    INNER JOIN ARTICLE art ON cl.id = art.GROUP_ID
    WHERE art.STATUS = '1' AND art.IS_CLOSE = '0' AND art.DELETE_FLAG = '0'
  ) art_msg
  WHERE art_msg.num = 1
) artic ON artic.ID = cir.ID
LEFT JOIN (
  SELECT ci.id, top.id AS top_id, top.UPDATED_TIME
  FROM CIRLE_GROUP ci
  INNER JOIN GROUP_TOP top ON ci.ID = top.GROUP_ID
  WHERE top.USER_ID = #{pageDto.userId} AND top.DELETE_FLAG = '0'
) top_msg ON cir.ID = top_msg.id
WHERE mebm.USER_ID = #{pageDto.userId}
  AND cir.STATUS = '0'
  AND cir.IS_DISMISS = '0'
  AND cir.IS_ENABLE = '1'
  AND cir.DELETE_FLAG = '0'
ORDER BY CASE WHEN top_msg.top_id IS NOT NULL THEN top_msg.top_id ELSE '1' END DESC,
  top_msg.UPDATED_TIME DESC, mebm.TYPE ASC, mebm.JOIN_TIME DESC

请注意，以上只是一个示例，具体的优化策略需要根据数据库的结构和数据量进行调整。同时，建议在进行优化之前先备份数据库，并在测试环境中进行验证。