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

【mysql报错1055 报错解决办法】[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

Time: Monday, December 20, 2021 14:44:04

As the winter vacation is approaching, the examinations of various subjects are coming one after another. The subject of the author's examination today is MySQL. I have obtained the document prepared by the teacher and copied and pasted it in Navicat. After execution, an error is suddenly reported: Record the solution:

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Error code displayed:
[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

This is the first time I encountered such an error, so I copied the error message and opened Baidu. It seems to be due to the MySQL version problem. I opened Xiaopi and found that I was using MySQL 8 version:

They said that if it is MySQL 5 version, there will be no such problem, of course I don't want to switch to MySQL 5, so I didn't try,
There is a temporary solution on the Internet, so I won't say it here,We directly modify the configuration file and modify it permanently:
Next, we will solve the problem of MySQL 8 version:

Find your own MySQL installation directory. Note that it is not the Navicat installation directory, but MySQL.If you installed a tool like phpstudy or phpstudy_pro like me, you can open the small skin, click Settings, click Configuration File, click mysql.ini, and then click MySQL8.0.12:

Then it will open a mysql configuration file mysql.ini, add this at the end of the configuration fileSnippet:

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION

Note: Do not add in [mysql] and [client] below, to be added below [mysqld], don't ask me how I know!!!

Then, save the configuration file and close it, open Pi, and restart MySQL:

Re-execute our SQL statement, no error is reported, OK!

Ran Goose, unfortunately, when I solved this problem, the exam time was over, and no one told me that the exam time was only 20 minutes ahhhhhhh!!!!!!!!!!!!!!!!!!

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