code: public function table($table, /*# string */ $tableAlias = '')
      {
          $tbl = $this->fixTable($table, $tableAlias);
  
          // clone the builder if table different
          if ($tbl != $this->tables) {
              $clone = clone $this;
              $clone->tables = $tbl;
              return $clone;
          } else {
              return $this;
          }
      }
docs: Clone the builder and set default table[s]
  
  ```php
  // a user table query builder
  $user = $builder->table('user', 'u');
  
  // working on user table
  $user->select()->...
  ```
  
  {@inheritDoc}