Discuz X3.4 用户表 主表 存档表 数据合并教程
1，登录后台，工具，计划任务，取消勾选 每日用户表优化2，关闭站点，备份数据库，如果可以，全站备份更好
3，不要手贱去点 后台，站长，用户表优化
4，打开你的MYSQL管理工具，比如 phpMyAdmin
几个受影响需要更改的表
pre_common_member
pre_common_member_archive
pre_common_member_count
pre_common_member_count_archive
pre_common_member_field_forum
pre_common_member_field_forum_archive
pre_common_member_field_home
pre_common_member_field_home_archive
pre_common_member_profile
pre_common_member_profile_archive
pre_common_member_status
pre_common_member_status_archive
5，看一下上面数据库中的几个表，受影响了几个，受影响的都要修改
打开pre_common_member_archive
删除重复内容
[*]ALTER IGNORE TABLE pre_common_member_archive ADD UNIQUE INDEX(`uid`)
把 pre_common_member_archive 内容复制到 pre_common_member
[*]insert into pre_common_member select * from pre_common_member_archive
再删除主表重复内容，清空存档表内容
上面做完基本就没事了，有强迫症的可以删除带有Archive的空表，备份的bak表都可以删除。
删除带有Archive的空表，更新缓存的时候出现这个错误，而且注册不了（在注册的最后一步会出现不跳转的情况）
(1146) Table 'db_web411070.common_member_archive' doesn't existSELECT COUNT(*) FROM common_member_archive
在站长—数据库—升级(Discuz! 数据库升级 - 请将数据库升级语句粘贴在下面:)中执行语句 ：
为了数据安全执行该语句前建议备份数据
[*]DELETE FROM `pre_common_setting` WHERE `skey` = 'membersplit';
若没有找到执行语句的输入窗口 则修改
config/config_global.php
当中的
$_config 设置修改为 1
(为了安全执行完该语句后 确认解决了1146错误后 再将配置该回来 )刷新后再输入执行。
方法2：
后台，站长，数据库，升级
[*]insert into pre_common_member select * from pre_common_member_archive;
[*]insert into pre_common_member_count select * from pre_common_member_count_archive;
[*]insert into pre_common_member_field_forum select * from pre_common_member_field_forum_archive;
[*]insert into pre_common_member_field_home select * from pre_common_member_field_home_archive;
[*]insert into pre_common_member_profile select * from pre_common_member_profile_archive;
[*]insert into pre_common_member_status select * from pre_common_member_status_archive;
以上六条的意思就是把六个存档表中的东西合并到主表中。
然后再使用如下升级数据库：
[*]TRUNCATE TABLE`pre_common_member_archive`;
[*]TRUNCATE TABLE`pre_common_member_count_archive`;
[*]TRUNCATE TABLE`pre_common_member_field_forum_archive`;
[*]TRUNCATE TABLE`pre_common_member_field_home_archive`;
[*]TRUNCATE TABLE`pre_common_member_profile_archive`;
[*]TRUNCATE TABLE`pre_common_member_status_archive`;
以上六条的意思就是把六个存档表数据全部清空。
厉害:victory::victory::victory::victory::victory::victory::victory:
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