MySQL error: # 1 of ORDER BY clause is not in GROUP BY sql_mode = only_full_group_by

During MySQL operation, the following errors are often reported:

[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. The cause of the error
This error occurs in MySQL version 5.7 and above:
The default sql configuration of mysql version 5.7 is: sql_mode = "ONLY_FULL_GROUP_BY", this configuration strictly implements the "SQL92 standard".
When upgrading from 5.6 to 5.7, in order to be compatible with the syntax, most of them will choose to adjust sql_mode to keep it consistent with 5.6, in order to be compatible with the program as much as possible.

Solution

1. Modify the mysql configuration my.cnf (windows version is my.ini), add the configuration:

sql_mode='NO_ENGINE_SUBSTITUTION

2. SQL statement modification
1) Execute sql first, check sql_mode

SELECT @@sql_mode;

My local query results are as follows:

ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

2) Modify sql_mode, including existing libraries and new libraries, as follows:

SET @@global.sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

SET sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

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