Mysql Group by error: 1055-Expression #1GROUP BY this is incompatible with sql_mode=only_full_group_by

Original link: https://blog.csdn.net/loveliness_peri/article/details/88051316

It is because only_full_group is configured in sql_mode in the default MySQL configuration, which requires GROUP BY 
 Contains all the fields that appear in the SELECT.

 only_full_group_by description:
 only_full_group_by: To use this is to use the same group rules as Oracle, 
 The select column must be in the group, or it is an aggregate column (SUM, AVG, MAX, MIN).
 In fact, this configuration currently personally feels similar to distinct, so just remove it

SELECT * FROM table name GROUP BY field

1055 - Expression #1 of SELECT list is not in GROUP BY clause and contains 
nonaggregated column 'XXX' which is not functionally dependent on columns 
in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

The reason for the problem: there are more in sql_mode:ONLY_FULL_GROUP_BY

Use SQL statements to query this configuration:

select @@sql_mode;

Solution: Add the corresponding setting in the configuration file: (is to execute the query sql_mode statement above; removeONLY_FULL_GROUP_BYCan)

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION

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