最后一个步骤是，当成功处理库存发货之后，将订单汇总队列项从消息队列中删除。
The last step is to delete the order summary queue item from the message queue if the inventory shipment was successfully processed.
过多的库存会耗尽你的资金，为此你有必要删除多余的库存，通过执行更好的管理条规来使你的事业蒸蒸日上。
Excess inventory can eat up your cash, so ditch the superfluous stock and use better management practices to keep your business booming.
上面的item_in_stock过程检查某个特定项是否位于库存中，如果是的话，那么将它从stock表中删除。
The item_in_stock procedure above identifies if a particular item is in stock and if so, deletes it from the stock table.
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