SQL - IF EXISTS UPDATE ELSE INSERT Syntax Error

Question

I have the following SQL query:

IF EXISTS(SELECT * FROM component_psar WHERE tbl_id = \'2\' AND row_nr = \'1\') 
   UPDATE component_psar
      SET col_1 = \         


        

Answer 1

In this approach only one statement is executed when the UPDATE is successful.

-- For each row in source
BEGIN TRAN    

UPDATE target
SET  = 
WHERE 

IF (@@ROWCOUNT = 0)
   INSERT target ()
VALUES ()

COMMIT