Question

我想用下面的别名列来构建东西，但是我不知道如何使它成为Laravel查询。以下是我的SQL。

SELECT
    d.*,
    d.damaged_building,
    d.total_victim 
FROM
    (
        SELECT
            delete_flg,
            damage_id,
            create_time,
            reg_user_name,
            municipality_id,
            report_time,
            district,
            village,
            disaster_type,
            cause_of_disaster,
            (
                bd_major_damage1 + bd_minor_damage1 + bd_major_damage2 + bd_minor_damage2 + bd_major_damage3 + bd_minor_damage3
            )
            as damaged_building,
            (
                hi_hd_deaths + hi_hd_serious_injuries + hi_hd_minor_injuries + hi_hd_missing_persons + hi_hd_sick_persons
            )
            as total_victim 
        FROM
            d_damage 
        WHERE
            delete_flg = 0 
        ORDER BY
            create_time DESC
    )
    d

我想将此翻译为Laravel Query Builder的Eloquent，以便在我的控制器中使用。

Answer 1

如果我只是因为要把它带到任何地方，就只能坚持学习SQL查询，您可以学习很多框架/工具，而不是花时间在Laravel上。无论如何，您仍可以使用原始表达式在laravel中使用sql查询：https://laravel.com/docs/5.8/queries#raw-expressions

Answer 2

您可以尝试

DB::table('d_damage')
->where('delete_flg',0)
->orderBy('create_time', 'desc')
->select('delete_flg', 'damage_id', 'create_time', 'reg_user_name', 'municipality_id', 'report_time', 'district', 'village', 'disaster_type', 'cause_of_disaster',DB::raw('(bd_major_damage1 + bd_minor_damage1 + bd_major_damage2 + bd_minor_damage2 + bd_major_damage3 + bd_minor_damage3) as damaged_building'),DB::raw('(hi_hd_deaths + hi_hd_serious_injuries + hi_hd_minor_injuries + hi_hd_missing_persons + hi_hd_sick_persons) as total_victim'))
->get();

这可能不完全是，但几乎是

如何将SQL转换为Laravel查询

2 个答案: