SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #3 of SELECT list is not in GROUP BY clause and contains nonaggregated

Run the:

sudo mysql -u root -p

And change the SQL Mode for your MySQL Server Instance:

mysql > SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));

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Another way would be using the MySQL configs. Go to /etc/mysql/my.cnf:

• add a section for [mysqld] and right below it add the statement sql_mode = ""

• restart the mysql service:

  sudo systemctl restart mysql
  

In laravel with MySql go to file config/database.php and it change in array MySql mode strict to false.

'connections' => [
    'mysql' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', '127.0.0.1'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'forge'),
        'username' => env('DB_USERNAME', 'forge'),
        'password' => env('DB_PASSWORD', ''),
        'unix_socket' => env('DB_SOCKET', ''),
        'charset' => 'utf8mb4',
        'collation' => 'utf8mb4_unicode_ci',
        'prefix' => '',
        'strict' => false, //from true
        'engine' => null,
    ],
],

Please just copy this line and run it. it worked for me.

SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));

Youtube video to fix this