title: precedence constraint editor in ssis package
body: <p>I want to have one SSIS package , in this case I have two varables : x=1 and y=0 and 3 tasks : one is Execute SQL Task (task A) and two Script Task (task B and C) . I want when we select x=1 in task A , task B is run and when select y=0 in task A , task C is run . In precedence constraint editor between A and B I select Expression and Constraint with success value and in precedence constraint editor between A and C I select Expression and Constraint with failure value but I don't know what expression must write in these precedence constraint editor . please help me 
  with respect    </p>