Forum Discussion

ValeriaBreve's avatar
ValeriaBreve
Post Partisan
3 years ago
Solved

lookup table values using a filter

Hello, I have 2 tables, A and B. I need to lookup column "ID" from table A, but only for the values of table B related column "ID2" are not null.   I would normally do a merge, only how do I hand...
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  • v-yanjiang-msft's avatar
    v-yanjiang-msft
    3 years ago

    Hi ValeriaBreve ,

    According to your description, you want to do a conditional merge queries. Here's my solution.

    Sample data:

    TableA:

    TableB:

    In my understanding, for null value in TableB, after merge queries with TableA, you want to return blank instead of 40(Sales for null in TableA).

    Here's the original code when doing the general merge. Simply replace the three parameter in the Table.NestedJoin-"TableA" to "Table.SelectRows(#"TableA",each [ID]<>null)".

                                             

     

    Get the correct result:

    I attach my sample below for your reference.

     

    Best Regards,
    Community Support Team _ kalyj

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

v-yanjiang-msft's avatar
v-yanjiang-msft
Community Support
3 years ago

Hi ValeriaBreve ,

According to your description, you want to do a conditional merge queries. Here's my solution.

Sample data:

TableA:

TableB:

In my understanding, for null value in TableB, after merge queries with TableA, you want to return blank instead of 40(Sales for null in TableA).

Here's the original code when doing the general merge. Simply replace the three parameter in the Table.NestedJoin-"TableA" to "Table.SelectRows(#"TableA",each [ID]<>null)".

                                         

 

Get the correct result:

I attach my sample below for your reference.

 

Best Regards,
Community Support Team _ kalyj

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

ValeriaBreve's avatar
ValeriaBreve
Post Partisan
3 years ago

Thanks! This looks so easy... I was trying solutions that were more complicated, I did not know you could declare a subset of the table in the merge function ! So thank you so much for showing me 🙂