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I have functional table where (see on pic), for example, some day (DATE) certain MATERIAL comes into system (+KG value), and days where is going out of the system (-KG value).
I want to create graph where it can be seen for each MATERIAL how much entered into the system, during some period of time or the whole year. Also, to be able see how much each MATERIAL exit the system (-KG) during some period of time or the whole year.
How to do it guys
Hope I explain well the issue
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