Give All Results Even When Not Available

Hello I have a problem with a query..
What I want:
I have a query that selects from different tables:

Code:

SELECT * FROM table1 as t1 ,table2 as t2 WHERE t1.t2_Id = t2.Id


But now I want all results from table1 even if it's not linked with table2, if that's the case i want to add something like:

Code:

CASE
WHEN 'notlinked' THEN 1
ELSE 0
END HighLight


that way I can show the rows that have to be manually linked
hope you understand my problem...

thanks!