根据单一责任开发原则来讲,在laravel的开发过程中每个表都应建立一个model对外服务和调用。...from($table)
public function join($table, $first, $operator = null, $second = null, $type = 'inner', $where...')
public function joinSub($query, $as, $first, $operator = null, $second = null, $type = 'inner', $where...= false)
public function leftJoin($table, $first, $operator = null, $second = null)
public function where...($column, $operator = null, $value = null, $boolean = 'and')
public function orWhere($column, $operator