從數據庫中檢索數據時如何隱藏重復數據

Question

我有這個功能：

public function readData(){
$TableB1 = \DB::table('users')
->join('group_user', 'users.id', '=', 'group_user.user_id')
->join('groups', 'groups.id', '=', 'group_user.group_id')
->join('meetings', 'users.id', '=', 'meetings.owned_by_id')
->select(
    'users.name as name',
    'group_user.user_id as id',
    'groups.name as groupname',
    'meetings.owned_by_id as meetings'
)
->groupBy('users.id')
->get();

我收到此錯誤：

當我刪除groupBy部分時，它可以工作，但是像這樣的重復數據它返回這樣的數據：

[{"name":"Mohamed Adel","id":6,"groupname":"Team Mohamed","meetings":6},{"name":"Mohamed Adel","id":6,"groupname":"Team Mohamed","meetings":6},{"name":"Norman Osborn","id":2,"groupname":"Team Mohamed","meetings":2},{"name":"Harry Osborn","id":3,"groupname":"Team Harry","meetings":3}]

謝謝你。

Answer 1

用這個

public function readData()
{
    $TableB1 = \DB::table('users')
        ->join('group_user', 'users.id', '=', 'group_user.user_id')
        ->join('groups', 'groups.id', '=', 'group_user.group_id')
        ->join('meetings', 'users.id', '=', 'meetings.owned_by_id')
        ->select(
            'users.id as user_id',
            'users.name as name',
            'group_user.user_id as id',
            'groups.name as groupname',
            'meetings.owned_by_id as meetings'
        )
        ->groupBy('user_id')
        ->get();

將 config\\database.php 更改為

'mysql' => [
    'driver' => 'mysql',
    'host' => env('DB_HOST', 'localhost'),
    'port' => env('DB_PORT', '3306'),
    'database' => env('DB_DATABASE', 'forge'),
    'username' => env('DB_USERNAME', 'forge'),
    'password' => env('DB_PASSWORD', ''),
    'charset' => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix' => '',
    'strict' => false, // must be false
    'engine' => null
],