Question

I have a report that shows items by goups.

Lets say he groups are:
In Inventory
In Process

When there is no data In Inventory, that row is not shown. any idea how to show a row with 0 inventory?

Answer 1

It sounds as though you are grouping on a field (such as stock item status), where there may be 0 rows returned for certain values of the field (such as In Inventory). The answer is to amend your query to right outer join to a lookup table holding all values of the grouping field, for example as follows:

select lu.status_value           stock_item_status, 
       si.stock_item_status      item_status, 
       si.stock_item_id, 
       coalesce(si.quantity,0)   quantity
from stock_item si
right join stock_item_status lu
on si.stock_item_status = lu.status_value

This will now include a row returned for stock_item_status values with no corresponding stock_items, with null values for all of the stock_item fields.

If you were including a subtotal of stock_item.quantity values for each status, changing this to coalesce(...,0) should ensure that this null value is displayed as 0.