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Frequent Visitor

## Intersection of 3 tables

I have 3 tables with the same columns, including an ID column, but different data. I want the intersection of all these 3 tables and find the list of IDs that are common to all three. How can I do that?

1 ACCEPTED SOLUTION
Community Champion

@shreyaks1009 , You can update your code as below:-

``````Table 4 =
VAR _tab1 =
DISTINCT ( Table1[ID] )
VAR _tab2 =
DISTINCT ( Table2[ID] )
VAR _tab3 =
DISTINCT ( Table3[ID] )
RETURN
DISTINCT ( INTERSECT ( INTERSECT( _tab1, _tab2 ), _tab3 ) )``````

Best Regards,
Samarth

If this post helps, please consider accepting it as the solution to help the other members find it more quickly.

6 REPLIES 6
Community Champion

It would be helpful if you could share some sample data with Expected output, it helps to give answer more specifically. In the meantime you can try to create a new table with below code to get your desired output:-

``````Table 4 =
VAR _tab1 =
DISTINCT ( Table1[ID] )
VAR _tab2 =
DISTINCT ( Table2[ID] )
VAR _tab3 =
DISTINCT ( Table3[ID] )
RETURN
DISTINCT ( INTERSECT ( UNION ( _tab1, _tab2 ), _tab3 ) )``````

Thanks,

Samarth

Best Regards,
Samarth

If this post helps, please consider accepting it as the solution to help the other members find it more quickly.

Frequent Visitor

Interesting.. I will try this. Thank you!

Table 1 [ID] = {a, b, c, d, e, f, p, q, r, x, y, z}

Table 2 [ID] = {d, e, g, h, k, l, m, r, w, x, y}

Table 3 [ID] = {a, c, d, e, j, k, r, x}

I need the output -

Table 4 [ID] = {d, e, r, x}

For now, I have the following solution -

Table 5 = {Inner Join (Table 1, Table 2)}

Table 6 = {Inner Join (Table 5, Table 3)}

Table 6 is giving me the output I need. Would like to learn a more efficient way.

Apologies if the syntax for describing my problem is confusing. First time posting in the forum. Thank you for your help.

Community Champion

@shreyaks1009 , You can update your code as below:-

``````Table 4 =
VAR _tab1 =
DISTINCT ( Table1[ID] )
VAR _tab2 =
DISTINCT ( Table2[ID] )
VAR _tab3 =
DISTINCT ( Table3[ID] )
RETURN
DISTINCT ( INTERSECT ( INTERSECT( _tab1, _tab2 ), _tab3 ) )``````

Best Regards,
Samarth

If this post helps, please consider accepting it as the solution to help the other members find it more quickly.

Frequent Visitor

This helps, thanks!

Impactful Individual

You can use RELATED function or LOOKUPVALUE in this case.

https://docs.microsoft.com/en-us/dax/related-function-dax

https://docs.microsoft.com/en-us/dax/lookupvalue-function-dax

I hope this helps.

Mark this as a solution if I aswered your question.

Thanks

Frequent Visitor

Thanks for your help. Unfortunately, these solutions do not help with my problem. Tried to use them. All of the functions are targeted for 2 tables. I am hoping to learn a solution which gives me intersection of 3 similar datasets like in a Venn Diagram.

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