8.21 day37 MySQL 8.0.x Mac grouping group by in case of error ERROR 1055 (42000): Solution

Error message:

mysql> select * from emp group by gender;
ERROR 1055 (42000): Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'db01.emp.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

Analyze the reasons:

Enter and run:select @@global.sql_mode;

get:

+-----------------------------------------------------------------------------------------------------------------------+
| @@global.sql_mode                                                                                                     |
+-----------------------------------------------------------------------------------------------------------------------+
| ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION |
+-----------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

Cause of the error, because the default to open ONLY_FULL_GROUP_BYthis property, and the group by the way you want to perform conflict.

Solution:

Will ONLY_FULL_GROUP_BYthis property be removed:

Above to view the properties of these:

ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION

So it will ONLY_FULL_GROUP_BYbe removed, leaving the others.

get:

STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION

The reason according to the above to do, because your property and I could not exactly the same, so a direct copy my code is likely to be unsuccessful.

These then this piece of code into the following ' 'years

Performing downlink codes (if an error occurs, according to the above mentioned ' 'inside change oh):

set sql_mode = 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

Finally, you have to enter exitor quitexit at the mysql client, and then log back in again, this time setting to take effect.