Step 4
Now create another column that links to the same table (I’ll name this Related Rows). This will be a calculated column that combines Column 1 and Column 2. Go into the Calculate section for this column and put in the formula
SwitchIf(
[Column 1].IsNotBlank() AND [Column 2].IsBlank() , [Column 1],
[Column 1].IsBlank() AND [Column 2].IsNotBlank(), [Column 2],
[Column 1].IsNotBlank() AND [Column 2].IsNotBlank(), ListCombine([Column 1], [Column 2]).Unique())