【ERROR】Unable to open underlying table which is differently defined or of non-MyISAM type or ...

Error:

Unable to open underlying table which is differently defined or of non-MyISAM type or doesn’t exist

Reason:

  1. MERGE引擎仅适用于MYISAM表
  2. union了不存在的表
  3. MERGE的时候引用了不在同一个数据库中的表,并且该表没有指定数据库名字
  4. 各个表的结构(索引、引擎、列、字符集等)不完全一致

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转载自blog.csdn.net/chenmiaoqin950606/article/details/80429397
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