sqlite分组查询取每个组内最近时间的一条记录

原创已于 2023-03-04 14:24:46 修改

· 1.2k 阅读

0 ·

版权

文章标签：

#sql #数据库

于 2022-08-19 22:32:45 首次发布

android 同时被 2 个专栏收录

41 篇文章

订阅专栏

java

27 篇文章

订阅专栏

这篇博客探讨了一个SQL查询，其目的是从数据库中获取指定用户最近的聊天记录。查询涉及到多个表的联接，包括`CHAT_GROUP_DETAIL`表，并通过`sent_time`字段找到用户每个群组内的最后一条消息。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

效果：

在这里插入图片描述
删除记录后组显示最近一条记录

sql：

String sql = String.format("select " +
                "mg.is_read,mg.del_flag, mg.group_name, mg.group_name,mg.intention_type," +
                "mg.chat_type,mg.short_msg,mg.group_avatar,mg.avoid_disturbance,mg.update_time," +
                "cgd.group_id,cgd.user_id," +
                "cgd.sender_id,cgd.target_id," +
                "cgd.id,cgd.title,cgd.message,cgd.sender_avatar_name" +
                ",cgd.thumbnail_path,cgd.video_path,cgd.audio_path,cgd.img_path," +
                "cgd.file_path,cgd.sent_time,cgd.extra," +
                "cgd.uuid,cgd.received_status,cgd.sent_status,cgd.media_type" +
                " from %s as cgd inner join (select max(sent_time) " +
                "as max_sent_time from %s where user_id = '%s' group by group_id) as " +
                "c_max on cgd.sent_time = c_max.max_sent_time inner join %s as mg " +
                "on mg.group_id = cgd.group_id order by cgd.sent_time desc", CHAT_GROUP_DETAIL, CHAT_GROUP_DETAIL, uid, MSG_GROUP);