laravel eloquent union, join 2 columns in the same table

I have the following columns in the same table

Column 1
--------
1

2

3

Column 2
--------
4

5

6

I want it to be displayed like

Columns
--------
1

2

3

4

5

6

You can use unionAll to make a single trip to the database: PHPize Demo

$result  = DB::table('yourTable')
    ->select('column1 as res')
    ->unionAll(
        DB::table('yourTable')
            ->select('column2 as res')
    )
    ->get();