[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains

、和[3]引用的内容都是关于MySQL报错1055的问题。这个错误是由于在使用ORDER BY子句时，ORDER BY子句中的列没有在GROUP BY子句中，并且包含了不是在GROUP BY子句中的列，这与sql_mode=only_full_group_by选项不兼容所导致的。换句话说，这个错误是由于使用了不合法的ORDER BY子句。

要解决这个问题，可以有以下几种方法：
1. 修改SQL查询语句，确保ORDER BY子句中的列都在GROUP BY子句中，并且不包含不在GROUP BY子句中的列。这样可以确保查询语句符合sql_mode=only_full_group_by选项的要求。
2. 修改MySQL配置文件，将sql_mode选项中的only_full_group_by选项去掉。这样可以关闭只允许全面GROUP BY的模式，但需要注意这可能会导致其他潜在的问题。
3. 升级MySQL版本到5.7.5或更高的版本。从MySQL 5.7.5开始，sql_mode=only_full_group_by成为默认设置，不再允许ORDER BY子句中的非聚合列。

请根据具体情况选择适合的解决方法来解决[Err] 1055的问题。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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