Relationship in direct query mode

[TaufikMaggangka]

Dear All, I need help about relationship in direct query mode. Basically, I have two table. Here my illustration of my issue.

Table 1.

ID	ID Student	Name Student	CovidSymptoms
1	1111	A	Fever
2	2222	B	Cough
3	3333	C	Loss of smell
4	4444	D	Fatigue
5	5555	E	Fever

Table 2.

ID	ScreenerID	ID Student	AntigenResult
1	2	2222	Positive
2	5	5555	Negative
3	3	3333	Not Tested

I Try to create relationship between " ID" in table 1 and "ScreenerID" in table 2 because the value have same unique value. I create "one to one" Cardinality" and cross filter direction "Both"(Note: Sigle cannot be apply). But the result I got is messy, Here my result when I try to create a table visual:

ID Student	Name Student	CovidSymptoms	Antigen Result
1111	A	Fever
1111	A	Fever	Positive
1111	A	Fever	Negative
1111	A	Fever	Not Tested
2222	B	Cough
2222	B	Cough	Positive
2222	B	Cough	Negative
2222	B	Cough	Not Tested
3333	C	Loss of Smell
3333	C	Loss of Smell	Positive
3333	C	Loss of Smell	Negative
3333	C	Loss of Smell	Not Tested
4444	D	Fatigue
4444	D	Fatigue	Positive
4444	D	Fatigue	Negative
4444	D	Fatigue	Not Tested
5555	E	Fever
5555	E	Fever	Positive
5555	E	Fever	Negative
5555	E	Fever	Not Tested

Basically, Every ID have 4 value even ID that not consist in the table 2.

I Hope ther result will be like this :

ID Student	Name Student	CovidSymptoms	Antigen Result
1111	A	Fever
2222	B	Cough	Positive
3333	C	Loss of Smell	Not Tested
4444	D	Fatigue
5555	E	Fever	Negative

Anyone can help, I am new with power bi :). Anyhelp will be really appreaciated.

Thanks.

[Anonymous]

This requires a Join and not relationship.

In Power Query Do a LeftJoin:

Table 1 LeftJoin Table2

Also, if you can explain a bit more on unique columns in both the tables, it would be helpful.

[TaufikMaggangka]

Hi @Anonymous ,

Unique values is ID on this case. the unique value have same value for each data registered. 

Basically, we have 2 form to input the data on the database. the first form is about screener table, the purpose of this table to screen student which have covid symptoms. the ID is unique value that fill automatically. the second form is to submit antigen result for each student that have screen. the id on the first table and second table have same unique value. it is why I thought it can be done with relationship.

Any more explananation about left join table on my cases will be really appreciate. I am not resolve this issue yet.

[amitchandak · Accepted solution]

@TaufikMaggangka , Make it one to Many and bi-directional and try. Or you need to have a common table for

ID

ID Student

Name

And use that.