If you have a multi-level hierarchy in TARGIT, you can refer to levels with modifiers that can help you refer to:
- Children (the level below the current one)
- Siblings (all dimension values one the same level as the current one)
- Levels (level 0 being the all level of a dimension, level 1 being the top of the hierarchy, level 2 next level etc)
However, it is difficult in certain scenario to identify which level you are currently addressing.
Let's say you want to create a column that does different calculations on different levels of the hierarchy.
Then you would like to write something like:
if level1 then calculation1 else if level2 then calculation2 else if level3 then calculation3 etc...
That's not possible out of the box, but here's a few intermediate calculations that allows you to do just that.
Here's a crosstab showing a hierarchy with 4 levels: Terrritory, Country, Region and Customer:
Now we start from the bottom to identify levels.
1st calculation (as a new measure) uses this syntax to identify lowest level (level 4 in this case) of the hierarchy:
if allcount(d1, all(c), m1) = 0 then 4 else 0
If a row has no "children", we are at the lowest level of the hierarchy, and we will mark these up with the value 4.
Now we have a new measure (m2). We can use this to move up to next level of the hierarchy with this calculation (as a new measure):
if max(d1, all(c), m2) = 4 and min(d1, all(c), m2) = 4 then 3 else 0
This does a test on measure 2 (m2) - which is my previous calculation and say if both min and max are 4 - I'm pretty sure that we are looking at the rows identified in the previous calculation.
If these rows are the children of the current level - then that level must be the one above level 4.
Same method applied on the next level with this syntax:
if max(d1, all(c), m3) = 3 and min(d1, all(c), m3) = 3 then 2 else 0
And one more time with this calculation:
if max(d1, all(c), m4) = 2 and min(d1, all(c), m4) = 2 then 1 else 0
Now we have this intermediate result:
Our final calculation just sums op measures 2 to 5 (our 4 calculations):
sum(all, 0, m2:m5)
Now we are there:
All this was just prerequisites to be able to write syntax like this:
if sum(d1,0,m6)= 1 then calculation1 else if sum(d1,0,m6)=2 then calculation2 else if sum(d1,0,m6)=3 then calculation3 else calculation4
Now you have the levels ready for your if sentence :-)
NOTE: This tip works when your hierarchy is fully expanded. With a partially expanded hierarchy, you will get results that might not be what you expected.