Generate unique random numbers using SQL

Question

I have some SQL code which generates random numbers using the following technique:

DECLARE @Random1 INT, @Random2 INT, @Random3 INT, @Random4 INT, @Random5 I         


        

Answer 1

For Laravel:

 public function generatUniqueId()
    {
        $rand = rand(10000, 99999);
        $itemId = $rand;
        while (true) {
            if (!BookItem::whereBookItemId($itemId)->exists()) {
                break;
            }
            $itemId = rand(10000, 99999);
        }

        return $itemId;
    }