sql语句转换成Laravel ORM的问题。

SELECT
    e.external_account_id,
    e.trade_type,
  e.stock_code,
    e.name,
    e.stock_name,
    SUM(e.trade_price * e.trade_count) / SUM(e.trade_count) AS trade_price,
    SUM(e.trade_count) AS trade_count
FROM
    (
        SELECT
            a.id,
            a.external_account_id,
            a.internal_account_id,
            a.trade_price,
            a.trade_count,
            b.stock_code,
            b.trade_type,
            c.name as stock_name,
            d.name
        FROM
            trades a,
            orders b,
            stocks c,
            external_accounts d
        WHERE
            a.order_id = b.id
        AND b.stock_code = c.code
        AND a.external_account_id = 29
        AND d.id = 29
    ) AS e
GROUP BY e.stock_code, e.trade_type

这段sql转换成ORM应该怎么写啊= =。

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转换成ORM增加了复杂性，降低了sql语句可读性，还不如直接用DB::select()来执行sql。

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复杂的sql没必要改成orm