标签：needed 文件 遇到的问题 global hang most import imp 结果
安装很多次mysql，linux，windows版本的都有遇到的问题，总是不总结，结果就是走很多弯路，所以此次记录一下。
1.首先安装完mysql8.0.21 后，发现无my.ini，解决办法
1）默认安装到c盘会自动隐藏，记得打开隐藏文件找到他
2）找不到的情况下，在mysql的安装目录下新建my.ini文件（注意：刚新建完是没有小齿轮的，需要以下配置信息添加进去）
# For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html # *** DO NOT EDIT THIS FILE. It‘s a template which will be copied to the # *** default location during install, and will be replaced if you # *** upgrade to a newer version of MySQL. [client] default-character-set = utf8mb4 [mysql] default-character-set = utf8mb4 [mysqld] character-set-client-handshake = FALSE character-set-server = utf8mb4 collation-server = utf8mb4_bin init_connect=‘SET NAMES utf8mb4‘ # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. innodb_buffer_pool_size = 128M # Remove leading # to turn on a very important data integrity option: logging # changes to the binary log between backups. # log_bin # These are commonly set, remove the # and set as required. basedir = E:\mysql-8.0.21-winx64 datadir = E:\mysql-8.0.21-winx64\data port = 3306 # server_id = ..... # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. join_buffer_size = 128M sort_buffer_size = 16M read_rnd_buffer_size = 16M sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
2.报错[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column ‘information_schema.PROFILING.SEQ‘ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
1）网上的解决方案都是修改sql_mode 但是因为我的my.ini没有这个文件，怎么改都不生效，如果您也遇到同样的问题记得先把第一步操作了，重新启动mysq
2）在添加my.ini文件的时候就把sql_mode参数添加进去
3）该方法若mysql重启则失效
mysql中执行 show variables like ‘%sql_mode‘;
set @@GLOBAL.sql_mode=‘STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION‘;
mysql8 安装无my.ini配置文件和执行groupBy报错修改sql_mode不生效的解决方案
标签：needed 文件 遇到的问题 global hang most import imp 结果
原文地址：https://www.cnblogs.com/missmeng/p/13404228.html
