Data: Report? Two SUM() Column

[weirdguy]

Hello,

I need advise on how to solve this scenario. I am not sure whether I should use any Report Application such as Crystal Report or I can just simply use datagridview.

My scenario:
In a new form, a table will show a least 3 columns.
First, ItemID
2nd, Total Quantity Sold for the Current Month
3rd, Total Quantity Sold: Last month

ItemID     Current (Nov)     October
ABA1          100              85
ABB1          80               90

Hence, I can compare the figure of the current month with the past few month.

Right now, I do not have any problems building SQL_String for calculating the Total Qty Sold for the Current month and display it via DataGridView. But I am not sure how to additional column that calculate the Total for the past few month.

Please advise. And thanks in advance.

[MrMancunian]

You could use both. If you decide to use Crystal Reports, you can use a formula field to calculate the numbers and put in in a table. If you use a datagridview, you can use DataGridView.Co lumns.Add() and add the calculated numbers to that column. It's a matter of preference and design.

Steven

[weirdguy]

Thanks for your reply, Steven.

Do you have any examples to explain further on the two solution?

I had tried the Crystal Reports via Cross-Tab Report Wizard. It works fine.

Right now, i would like to know how to use DataGridView like you mention.
Should I use a Loop to calculate every ItemID?

[MrMancunian]

You could use a for...next loop, but I think it's easier to change the query you use, put the data in a DataTable and bind the DataTable to the gridview.

In case of the loop, bind the data to your datagridview first, then create a column, add it and the use the for...next to loop through your datagridview and fill the sumcolumn.

Steven