How to validate Insert data before inserting into cursor?

Question

Transact SQL

The question is this:
Data is selected from tables and added to cursor variables:

INSERT into [Myserver\my_instance].Special_table.dbo.stat (my_col1,my_col2,my_col3,my_col4,my_col5,my_col6,my_col7) VALUES (@var1, @var2,  @var3, @var4, @var5, @var6, @var7);

it is necessary to check my_col1 + my_col2 so that this pair does not give matches when inserted from the cursor.

Answer 1

EXISTS .

IF NOT EXISTS (SELECT * FROM [Myserver\my_instance].Special_table.dbo.stat WHERE ([my_col1] = @var1) AND ([my_col2] = @var2))

Answer 2

And what should happen if there is a match?