修复 Typecho 分类统计文章数目不对的错误

Author：浮居
发布时间：October 21, 2020
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1088 words
Categories：小岛の建造工艺

> 第二种方法（没试过）：管理->分类->全选->刷新

1. 找到所有分类（标签同理）

```
SELECT mid FROM typecho_metas AS m WHERE m.type = 'category';
```

2. 找到分类关系表，统计文章数

```
SELECT r.mid,
       count(cid)
FROM typecho_relationships as r
WHERE r.mid IN
    (SELECT mid
     FROM typecho_metas AS m
     WHERE m.type='category')
GROUP BY r.mid;
```

3. 提取出分类名称

```
SELECT r.mid,
       m.name,
       count(cid)
FROM typecho_relationships as r
LEFT JOIN typecho_metas as m ON m.mid=r.mid
WHERE r.mid IN
    (SELECT mid
     FROM typecho_metas AS m
     WHERE m.type='category')
GROUP BY r.mid;
```

4. 以上一个查询为基础修改原始表metas

```
UPDATE typecho_metas,
  (SELECT r.mid AS mid,
          count(cid) AS COUNT
   FROM typecho_relationships AS r
   WHERE r.mid IN
       (SELECT mid
        FROM typecho_metas AS m
        WHERE m.type='category')
   GROUP BY r.mid) AS tmp
SET typecho_metas.COUNT = tmp.COUNT
WHERE tmp.mid = typecho_metas.mid;
```

参考链接：[https://blog.phpgao.com/typecho_delete_category_mistake.html](https://blog.phpgao.com/typecho_delete_category_mistake.html)

Last modification：November 21, 2020