mysql group_concat and laravel group_concat使用

1.说明

group_concat 只能当做字段使用

需要操作多个字段时 需要使用连接符函数 concat 或者concat_ws

select 
    a.id,a.type, a.time,a.total,a.amount,a.number,a.examine,
    b.time as btime,b.info,
    GROUP_CONCAT(DISTINCT concat(a.id,':',b.time,':',b.info) SEPARATOR '|') 
from 
    sells as a 
left join 
    records as b 
on a.id=b.form where b.type='sell';

laravel中使用

$cus_voucher = DB::table('cus_voucher')
        ->where('cus_id',$id)
        ->groupBy('vid')
        ->select('vid','valid_period','vname',DB::raw('group_concat(sname,"|",times) as sometitle'))
        ->get();