hi to all,

may somebody guide me on the following:

I want to retrieve data from MYSQL and then want that PHP do calculation
- substract a particular field from its previous row. i.e. suppose i
have two field named DATE, STOCK and have 10 rows. Now i want that STOCK
on the 10th row should be substracted from 9th and so on.  May pls. help

with best wishes

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