视图报错 Illegal mix of collations (utf8mb4_general_ci,IMPLICIT) and (utf8mb4_unicode_ci,IMPLICIT) for operation '='
时间: 2023-08-24 17:06:57 浏览: 49
在执行SQL语句时,如果比较两个表的字段时出现了"Illegal mix of collations"错误,这意味着比较的两个字段的字符集不一致。具体地说,一个字段的字符集是utf8mb4_general_ci,而另一个字段的字符集是utf8mb4_unicode_ci。这个错误会导致"="操作无法进行。为了解决这个问题,有几个方法可以尝试:
1. 在查询时进行数据类型转换,使用CONVERT函数将字段的字符集转换为一致的utf8mb4_unicode_ci。例如,可以使用以下语句进行转换:
CONVERT(column_name USING utf8mb4) COLLATE utf8mb4_unicode_ci
2. 将两个表的字符集保持一致。可以使用ALTER TABLE语句将表的字符集修改为utf8mb4_general_ci。例如,可以使用以下语句进行修改:
ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci
以上是解决"Illegal mix of collations"错误的两种常见方法。通过执行这些方法,您可以确保比较的字段具有相同的字符集,从而避免出现错误。希望对您有所帮助!<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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