第一个Laravel项目。我有一个控制器函数检查条形码是否有记录。如果没有,请插入记录。如果是的话,请加一个作为计数。count from sellmode where barcode = ?'::insert('insert into sellmode (barcode, count) VALUES (?sellmode set count = count + 1 WHERE barcode = ?'[$barcode]); return view(se
下面有一个mysql查询 ( SELECT *,(select count(*) from `comments` where parent_id=b.deleted_at is null and parent_id is null order by created_at desc $res=DB::table('comments')
->select(DB::raw('comments.*, (se