Finding / calculating reporting level in organization/hierarchy

[griffy]

So, I have a list exported from a system containing unique employee ids (children). Each of these rows has the employee’s manager unique id (parent). One of the employees is the CEO and is to be considered level = 1

I would like a way to calculate per employee what level they are on in the organization. Is this possible in an effective way?

Have tried a solution I found before based on MATCH and INDEX, but it is cumbersome and seems to consume enormous resources to calculate and recalculated all the time.

Unique child id	Unique parent id	level
1	88	?
2	99	?
3	44	?
4	55	?

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[Michael M]

You haven't shown us how you arrive at the calculated level for each employee and what criteria is required to do the calculation.
You might be better providing a sample of data with the end result already shown and how you arrived at that result.

 

[griffy]

the formula i have used and that finally actually give the desired outcome is; =IF(A2=1;1;1+INDEX(C:C;MATCH(B2;A:A;0))) the issue is that its heavy and there are ~45k rows in up to 15 levels.
CEO is set to ID = 1

 

[Michael M]

Have you tried reducing your INDEX/MATCH ranges.....
You say approx 45000 rows, so change the formula to

=IF(A2=1;1;INDEX(C1:C50000;MATCH(B2;A1:A50000;0))+1)

 

[griffy]

I used this instead, that worked =IF(A2=1;1;1+INDEX($C$1:$C$45000;MATCH(B2;$A$1:$A$45000;0)))
i did however get 2k rows that got level zero
could this be don in a query ?