I have stored procudure which returns some data like this:
Trade mode;Area;Production place;Commodity;Reseller;Min_sell_price;Max_buy_price;Trans_count;Volume;avg_price;change_avg_price;last_trade_price;last_trade_volume
"Trade mode1"; "Area name1"; "Place1"; "Commodity1"; "No"; "33601"; "33601"; "1"; "1200"; "33601"; "+28"; "33601"; "1200"
"Trade mode1"; "Area name1"; "Place1"; "Commodity1"; "Yes"; "-"; "33601"; "0"; "0"; "33601"; "+28"; "33601"; "1200"
"Trade mode1"; "Area name1"; "Place2"; "Commodity2"; "No"; "35000"; "35000"; "1"; "180"; "35000"; "0"; "35000"; "180"
"Trade mode1"; "Area name1"; "Place1"; "Commodity2"; "Yes"; "-"; "35000"; "0"; "0"; "35000"; "0"; "35000"; "180"
And I need to create the report is SSRS 2008 R2 which looks like this:

I have no idea, how to merge cells in columns "Maximum buyer price", "Average price by commodity", "Average price change", "Last deal price", "Last deal volume". I would be grateful for any suggestions.
There is a way to do this, and it is a bit of a hack. Unfortunately, I don't have enough reputation yet, so Stack Overflow has linked my images rather than embedding them. Just click the links to see the images. Also, I wanted to include 10 images, but I only have enough reputation to embed 8.
Edit (Rafalon): I edited this post so we could see the images without having to follow the links every time.
Insert a table.
Delete the header row by right-clicking it and selecting "Delete Rows".
Right-click a cell in the remaining row, select "Row Group", and click "Delete Group". In the Delete Group dialog box, select the "Delete group only" radio button and click OK.

The little orange square bracket at the beginning of the row (indicating a group) will disappear.
Right-click a cell in the column where you want to vertically merge cells. In this example, the second column. Select "Add Group", then under "Column Group" select "Parent Group...". The Tablix group dialog box will appear. Enter any value in the "Group by" textbox. It doesn't matter what you enter since you will delete it shortly. In this example, I entered "1". Click OK.

Your table will now look like this:

Notice that there is a new square bracket at the head of the column, indicating there is a group there.
Delete the value in the cell (in this example, the "1" I entered).
Right-click the cell again and select "Insert Row". Select "Inside Group - Above". Do that again for as many cells as you want to vertically merge (minus 1 for the original cell). In this example, I want to vertically merge 3 cells, so I clicked "Insert Row" > "Inside Group - Above" twice. There are now three rows in the column group.




Unfortunately, you will not be able to delete the bottom row that was added when you created the column group.
And there you have it. In the image below, I have a report with 13 subreports. I wanted 2 subreports to show up on the right in the same row as a larger subreport on the left, and it works great.

This worked for me in Microsoft SQL Server Report Builder 11.0.2100.60 (Report Builder 3.0).
I hope this helps.
I don't see why you would need merged columns in your example. You can increase the height of the cells if you need to fit text onto more than one line.
Also if you use borders carefully you can give the appearance of merged cells even though there are not.
I hope this helps
EDIT
I see your example has changed. Insert a table into the cells you want split vertically So price range would be a table inside a table. As would traders.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With