Question

这是mysql中的查询

选择e_id，h_name， d_name，drf_name，credit_num，is_required，e_semester，stdate，endate，c_month，NUM 来自（SELECT electcourse.id e_id， h_id，d_id，ref_id，e_semester，stdate，endate，c_month，count（e_id）as num 来自electcourse = period的{{1}}离开加入p_id。id左连接 hospitalxdepartment上的hd_id = hospitalxdepartment。id离开加入关于选举的board id = e_id其中st_id =＆＃39; admin＆＃39;通过...分组 e_id）我在hospital = hospital。h_id左连接上离开加入id department =部门d_id id离开加入 departmentreference = ref_id上的drfid df_semester = 105

这是我在laravel中的查询，但它收到了一些错误消息。

public function get_course($st_id,$semester){
        $from=DB::table('electcourse')
                ->selectRaw('electcourse.id as e_id','h_id','d_id','ref_id','e_semester','stdate','endate','c_month','count(e_id) as num',)
                ->leftjoin('period','p_id','period.id')
                ->leftjoin('hospitalxdepartment','hd_id','hospitalxdepartment.id')
                ->leftjoin('board','electcourse.id','e_id')
                ->where('st_id','=',$st_id)
                ->where('e_semester','=',$semester)
                ->groupBy('e_id');
        $query=DB::query()
                ->select('e_id','h_name','d_name','drf_name','credit_num','is_required','e_semester','stdate','endate','c_month')
                ->fromSub($from, 'T')
                ->leftjoin('hospital','h_id','hospital.id')
                ->leftjoin('department','d_id','department.id')
                ->leftjoin('departmentreference','ref_id','drfid')
                ->where('df_semester','=',$semester)->orderBy('c_month')->get();
        return $query;

    }

如果我没有在＆＃34; select＆＃34;中使用count，我确保它会起作用。串。有谁知道如何使用正确的计数方法修复它？

错误消息：＆＃34; Class App \ Repositories \ BoardRepository没有存在＆＃34; 这意味着DB格式错误。

Answer 1

我找到了一种生成正确查询的方法，但它会收到错误消息。

查询功能

public function get_course($st_id,$semester){

    $from=DB::table('electcourse')
            ->select('electcourse.id as e_id','h_id','d_id','ref_id','e_semester','stdate','endate','c_month',DB::raw('count(e_id) as num'))
            ->leftjoin('period','p_id','period.id')
            ->leftjoin('hospitalxdepartment','hd_id','hospitalxdepartment.id')
            ->leftjoin('board','electcourse.id','e_id')
            ->where('st_id','=',$st_id)
            ->where('e_semester','=',$semester)
            ->groupBy('e_id');
    $query=DB::query()
            ->select('e_id','h_name','d_name','drf_name','credit_num','is_required','e_semester','stdate','endate','c_month')
            ->fromSub($from, 'T')
            ->leftjoin('hospital','h_id','hospital.id')
            ->leftjoin('department','d_id','department.id')
            ->leftjoin('departmentreference','ref_id','drfid')
            ->where('df_semester','=',$semester)->orderBy('c_month')->get();
    return $query;

}

错误讯息：

＆＃34; SQLSTATE [42000]：语法错误或访问冲突：1055 ＆＃39; yangming567.electcourse.id＆＃39;不在GROUP BY中（SQL：选择e_id， h_name，d_name，drf_name，credit_num，is_required，来自e_semester，stdate，endate，c_month electcourse。id为e_id，h_id，d_id，ref_id，e_semester， stdate，endate，c_month，计数（e_id）为来自electcourse的数字在period = p_id上离开加入period。id左连接 hospitalxdepartment = hd_id上的hospitalxdepartment。id离开在board上加入electcourse。id = e_id其中st_id = admin和 e_semester = 105 e_id组{} T左加入hospital h_id = hospital。id在department =左加入d_id = department。id在departmentreference =上离开加入ref_id drfid其中df_semester = 105订单c_month asc）但是，我将此错误消息查询复制到Mysql，这是工作!!!! 有人知道如何在laravel中修复我的查询吗？

Laravel - 如何在查询中获取计数数据？

1 个答案: