fetchColumnGroup() public method

Group by first column
public fetchColumnGroup ( string $sql, array $params = [] ) : array
$sql string SQL query with placeholders "SELECT ip, id FROM users"
$params array params for query placeholders (optional)
return array
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 /**
  * fetchColumnGroup
  */
 public function testFetchColumnGroup()
 {
     $result = $this->db->fetchColumnGroup("SELECT status, COUNT(id) FROM test GROUP BY status");
     $this->assertArrayHasKey('active', $result);
     $this->assertArrayHasKey('disable', $result);
     $this->assertArrayHasKey('delete', $result);
 }