我正在尝试获取 Laravel select 语句中返回的记录总和,但我似乎无法正确获取。我的原话如下;$results = DB::table('polls')->select('polls.id as poll_id', 'poll_votes.vote_count as vote_count', 'poll_options.id as poll_option_id') ->join('poll_options','polls.id','=','poll_options.poll_id') ->join('poll_votes', 'poll_options.id', '=', 'poll_votes.poll_option_id') ->where([['polls.status','=','1'], ['poll_options.status','=','1'],]) ->get();我尝试在该->select行的最后一个元素之后添加以下内容,但我不断收到错误消息;DB::raw('sum(poll_votes.vote_count) total_votes')任何帮助将不胜感激
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