如何获得PHP lararavel中的总运行平衡列？

Question

我有一个数据库表gl_trans

这是我的预期输出。

到目前为止，这是我的源代码。

        $start_date = (!empty($_POST["start_date"])) ? ($_POST["start_date"]) : ('');
        $data = $usersQuery
        ->select(
            'gl_trans.tran_date as date2', 
            'gl_trans.account as account2', //GET ACCCOUNT COLUMN
             DB::raw('(CASE WHEN gl_trans.amount >= 0 THEN gl_trans.amount ELSE 0 END) AS debit'), //GET DEBIT COLUMN
             DB::raw('(CASE WHEN gl_trans.amount < 0 THEN -gl_trans.amount ELSE 0 END) AS credit'), // GET CREDIT COLUMN
             DB::raw('(debit - credit) AS current_balance'),
             DB::raw('(SELECT sum(amount) FROM gl_trans WHERE tran_date < "'.$start_date.'" AND account = account2 and amount >= 0 ) AS debit_open_balance'), //SUM OF PREVIOUS DATE OF DEBIT VALUES (POSITIVE AMOUNT)
             DB::raw('(SELECT sum(amount) FROM gl_trans WHERE tran_date < "'.$start_date.'" AND account = account2 and amount < 0 ) AS credit_open_balance'), //SUM OF PREVIOUS DATE OF CREDIT VALUES (NEGATIVE AMOUNT)
             DB::raw('( SELECT (CASE 
                WHEN current_balance >= 0 
                THEN (COALESCE(debit_open_balance, 0) - COALESCE(-credit_open_balance, 0) + current_balance) 
                ELSE (COALESCE(debit_open_balance, 0) - COALESCE(-credit_open_balance, 0) - current_balance) end)) as balance') // GET BALANCE COLUMN USING THE CURRENCT BALANCE 
         ) 
        ->orderBy('date2', 'ASC')
       ->get();

我的问题是我无法使用$ star_date来获取debit_open_balance和credit_open_balance的确切值，因为它应该获取行的tran_date，但它不是唯一的。 我尝试使用id

注意：期初余额是上一个日期（<$ start_date）的（总正金额-负总金额）

请帮助谢谢。