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Illegal mix of collations for operation ‘UNION‘(bug记录)
2022-07-25 19:27:00 【sword to coding】
在使用union语句时,出现错误 Illegal mix of collations for operation 'UNION'
原因是union语句会将两集合进行排序,此时每个字段的排序规则应该一样。
如果不一样如下:

两个排序规则不一样就会报错。
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