Fill blank values when column is based on left join table

[esaesa]

So simple problem but I just dont figure out how to fill blank values in table visualizations. If someone could help me?

I have left joined table1 to table2. Where should I put the third column and how? Calculate column or measure?

Table1(col1)	Table2(col1)	col3 (Wanted):
A	A	if(table1(col1)=tabl2(col1);"ok";"no")
B	B	if(table1(col1)=tabl2(col1);"ok";"no")
C		??if(table1(col1)=tabl2(col1);"ok";"no")

[v-chuncz-msft · Accepted solution]

@esaesa,

You may add two calculated columns to Table1.

Column =
RELATED ( Table2[col1] )

Column 2 =
IF ( ISBLANK ( RELATED ( Table2[col1] ) ), "no", "ok" )