mysql error this is incompatible with sql_mode = only_full_group_by
tags: mysql only_full_group_by
mysql5.7 + version is turned on by defaultonly_full_group_byMode,When you turn on this mode, the column must query conditions are grouped. The original group by statement will be reported this error.
View sql_mode
select @@global.sql_mode;
result:
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
We can see that the first one isonly_full_group_by
Solution
1：RemoveONLY_FULL_GROUP_BY, Reset the value.
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';
2：() Function using any_value
SELECT
any_value (ID) AS ID,
any_value(PIC_TYPE),
PIC_NAME
FROM
`cp_picname_mapping` g
GROUP BY
g.PIC_NAME
Introduce GROUP_CONCAT () function.
Action: After the completion of packet, the same column together
select GROUP_CONCAT(
s.name SEPARATOR ';'
) as names FROM student s GROUP BY s.class_id
Students grouped by class, take out all the names make up names, with each student's name;No split.
select GROUP_CONCAT(
CONCAT(age,':'),
s.name SEPARATOR ';'
) FROM student s GROUP BY s.class_id
Compared with the above query, more than aCONCAT()Function, the name of each student's age and put a piece, with:Dividing, by a plurality of;No split.
Another reference example
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