Power BI DAX Join error

Thanks Greg, But can you tell me how does NATURALINNERJOIN work in my situation. what's the use of NATURALINNERJOIN and NATURAL LEFT OUTER JOIN, 

my sample table schema:

Table1: Partner_ID, User_Id

Table2: User_Id, User_Name,UserEmailId

can you please tell me how to inner join these two tables on User_Id?

Thanks in advance

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Greg_Deckler wrote:

Right, so oddly enough you can't have columns with the same names when joining tables in DAX. You usually use something like SELECTCOLUMNS to not change the names of the columns (trust me, it doesn't make sense but it works). This is explained very well in Phil_Seamark 's book, Beginning DAX with Power BI on pages 118-121.

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