The example program goes through the items table to fulfill orders from the stock table.
示例程序遍历 items 表,从 stock 表履行订单。
A STOCK table that links part keys and supplier keys and keeps track of the number of parts on hand at each supplier.
stock表,将零件键与供应商键相链接,跟踪每家供应商手头上的零件数量。
The item_in_stock procedure above identifies if a particular item is in stock and if so, deletes it from the stock table.
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。
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