php - A Database Error Occurred Error Number: 1055 -


changed database mysql mysqli , getting error - database error occurred

error number: 1055

expression #23 of select list not in group clause , contains nonaggregated column 'zipbizzlatestdb.pia.id' not functionally dependent on columns in group clause; incompatible sql_mode=only_full_group_by

select *,o.id id, group_concat(pia.applicantid) applicants  `pr_opportunity` o      left outer join pr_internal_applicant pia              on o.id = pia.positionid  o.approval_status='approved'  , date(o.deadline) > date(now())  group o.id

filename: /var/www/html/singlecodebase/feb152017/models/mod_common.php

line number: 6999

my model file mod_common below:

function get_opportunity_list() {     $sql = "select *,o.id id, group_concat(pia.applicantid) applicants              `".$this->mytables['opportunity']."` o              left outer join pr_internal_applicant pia              on o.id = pia.positionid              o.approval_status='approved'              , date(o.deadline) > date(now())              group o.id";     $query=$this->db->query($sql);      if($query->num_rows() > 0){         $rows = $query->result();      }            return $rows; }

no clue how solve error

it occurs in mysql 5.7 check link [https://www.sitepoint.com/quick-tip-how-to-permanently-change-sql-mode-in-mysql/] , follow steps work fine me.

or open file

vi /etc/mysql/my.cnf

add these line @ bottom of file

[mysqld] # ... other stuff here sql_mode = "strict_trans_tables,error_for_division_by_zero,no_auto_create_user,no_engine_substitution"

and save restart mysql 

sudo service mysql restart

note not window os


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