MySQL uses group by to report an error sql_mode=only_full_group_by
tags: Mysql
mysql opens only_full_group_by mode. In this mode, using the old version of mysql to get group by group data will report an error, the error is as follows:
`Expression #3 of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘wenming-bj-mtg.comments.organization_id’ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
Time: 0s`
The ONLY_FULL_GROUP_BY configuration enables "strict ANSIsql rules". The strict ANSI sql rules require that there are no aggregated columns when group by. When group by, all must be included in the field of group by.
Without turning off the ONLY_FULL_GROUP_BY mode, the columns that do not use aggregate functions will be connected to the fields that need group by. The sql is as follows:
SELECT obj_id, area_id, organization_id, stars FROMcommentsWHEREarea_3= 2424 ANDtype= 2 ANDenabled= 1 ANDcreated_at>= '2020-05-02 00:00:00' ANDcreated_at<= '2020-07-22 16:00:00' GROUP BY obj_id,organization_id,area_id,stars
That's it, if it helps you, please click ha.
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