Merge tables with multiple conditions in Power Query

[Anonymous]

Hi all, I'm trying to merge two tables a FACT Table and a DIM Table. It can easily be done in SQL with a LEFT JOIN, but was curious if there was a way to do this in Power Query. I am trying to pull values from the DIM table however the join is not on the Primary Key column but rather another column ,NumID, which contains duplicate values. Please let me know if more details are needed.

SQL Statement:

LEFT JOIN DIM ON DIM.NumID = FACT.CaseStatus AND DIM.Category = 'CaseStatus'

FACT Table

CaseID	CaseStatus	CaseType	CaseTier	CaseOrigin
1	1	1	1	1
2	2	2	2	2
3	3	3	3	3

DIM Table

KEY	NumID	Category	Value
1	1	CaseStatus	Status1
2	2	CaseStatus	Status2
3	3	CaseStatus	Status3
4	1	CaseType	Type1
5	2	CaseType	Type2
6	3	CaseType	Type3

Result:

FACT Table (After Merge)

CaseID	CaseStatus	CaseType	CaseTier	CaseOrigin
1	Status1	Type1	Tier1	Origin1
2	Status2	Type2	Tier2	Origin2
3	Status3	Type3	Tier3	Origin3

[Anonymous]

That's what I was looking for. Thank you very much.

[jgeddes · Accepted solution]

I think what you are looking for would be written like this in Power Query...

= Table.NestedJoin(#"Changed Type", {"CaseStatus"}, Table.SelectRows(#"DIM Table", each [Category] = "CaseStatus"), {"NumID"}, "DIM Table", JoinKind.LeftOuter)

In this code there is a Left Outer join between the FACT Table 'CaseStatus' column (#"Changed Type" is the last step before the join in the FACT Table) and the DIM Table 'Num ID' column, The DIM Table is filtered to select rows that have Category = 'CaseStatus'.