我如何在数据库中进行编辑

问题描述

我有一个具有[NSN]，[Location]，[Quantity]
的数据库
我想从数据库中删除只能从数量中删除的内容，

例[8888888]，[pll]，[7]如果我删除两个，则

[8888888]，[pll]，[5]
我该怎么做

我想删除项目[8888888]不要删除所有记录，而只删除此项目的数量分钟


例如，如果我要删除数量为7的itme [8888888]，
它的数量变为6

i have database which have [NSN],[Location],[Quantity]

i want make from which i can delete from my recod if it found in database delete only from quantity

ex [8888888],[pll],[7] if i delete two then

[8888888],[pll],[5]
how can i make it

imean if i want to delete item [8888888] don''t delete all record but only make quantity of this item mins


ex if i want to delete itme [8888888] which its quantity 7
the its quantity became 6

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