code: public function createView($viewName, $subQuery)
      {
          if ($subQuery instanceof Query) {
              list($rawQuery, $params) = $this->build($subQuery);
              array_walk(
                  $params,
                  function(&$param) {
                      $param = $this->db->quoteValue($param);
                  }
              );
              $subQuery = strtr($rawQuery, $params);
          }
  
          return 'CREATE VIEW ' . $this->db->quoteTableName($viewName) . ' AS ' . $subQuery;
      }
docs: Creates a SQL View.
  
  @param string $viewName the name of the view to be created.
  @param string|Query $subQuery the select statement which defines the view.
  This can be either a string or a [[Query]] object.
  @return string the `CREATE VIEW` SQL statement.
  @since 2.0.14