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。

A STOCK table that links part keys and supplier keys and keeps track of the number of parts on hand at each supplier.

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既然已成功创建了数据库，现在需要创建零件表。

Now that you have successfully created the database, you need to create a parts table.

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接着使用STOCK (DB2)表提取零件的供应商键和当前库存水平。

The stock (DB2) table is used to extract supplier keys and current stock levels for the parts.

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