Yii2 : How to write distinct SQL query?

Question

I want to implement following SQL queries in Yii 2 but with no success.

This should give total number of unique company names:

Answer 1

Answering my own question I got following working solutions:

Got the count for unique company_name:

$my = (new yii\db\Query())
    ->select(['company_name',])
    ->from('create_client')
    ->distinct()
    ->count();
echo $my;

List of distinct company_name and client_code:

$query = new yii\db\Query();
$data = $query->select(['company_name','client_code'])
    ->from('create_client')
    ->distinct()
    ->all();
if ($data) {
    foreach ($data as $row) {
        echo 'company_name: ' . $row['company_name'] . ' client_code: ' . $row['client_code'] . '<br>';
    }
}

Answer 2

Try this:

$total = YourModel::find()->select('company_name')->distinct()->count();

In Search Model:

public function search($params)
{
    $query = YourModel::find()->select('company_name')->distinct();
    // or
    $query = YourModel::find()->select(['company_name', 'client_code'])->distinct();

    $query->orderBy('id desc');

    $dataProvider = new ActiveDataProvider([
        'query' => $query,
    ]);
    // ...
}

Answer 3

All worked fine

return Clients::find()->count('DISTINCT(company_name)');

Answer 4

I hope this sample is useful for you

 $names = Yii::$app->db->createCommand('SELECT  count(DISTINCT(company_name)) as name FROM clients')
    ->queryAll();

for access the the data

foreach ($names as $name){
    echo $name['name'];
}