Laravel 查询构建器 GROUP BY 方法以及 SKIP 和 TAKE 方法

Question

I have around 50000 records and I am showing them in Datatable with server side processing. In my query I am applying the groupBy() method with skip() and take() method.

I want to be able to apply the limit AFTER groupBy() eg

If limit is 10 it should return 10 groups not 10 records.

DB::table('actions')->whereBetween('timestamp', 
array($dates['startDate'], $dates['endDate']))
->where('shop_name', $shopName)
->skip($start)
->take(10)
->get()
->groupBy('product_id');

With this query i am getting 10 records not 10 groups.

Answer 1

尝试在查询的最后但在get()之前省略take(10)并添加limit(10) get() 。

Answer 2

The order of your query statements are wrong. The following should do the trick. Notice the groupBy() is before your take() and get() .

In your case, you are grouping after the records have been fetched.

DB::table('actions')
    ->whereBetween('timestamp', array($dates['startDate'], $dates['endDate']))
    ->where('shop_name', $shopName)
    ->groupBy('product_id')
    ->skip($start)
    ->take(10)
    ->get()

Answer 3

DB::table('actions')
            ->whereBetween('timestamp', array($dates['startDate'], $dates['endDate']))
            ->where('shop_name', $shopName)
            ->get()
            ->groupBy('product_id')
            ->splice($start,$rowperpage);

and this order worked.