Between your control flow tasks, click on the arrow and choose Edit. When you do this, you get a dialog that allows you to check the "constraint" (success, completion or failure) of the task, an "expression" (i.e. you can have your execute sql task return a value, store that value in a variable, and check the value of that variable in an expression to determine whether to continue down the path you are editing), an "expression and a constraint", and an "expression or a constraint". These last two are the same except for the logic. "Expression and constraint" requires a true condition on both the expression and the constraint, "expression or constraint" requires a true condition on only one of the expression and the constraint.