Drain pineapple, reserving 2 tablespoons juice. Cut pineapple into thin strips, and place in a large bowl.
In a medium bowl, combine reserved pineapple juice and lemon juice. Toss with banana, and add to pineapple. Add cabbage, celery, mandarin oranges, walnuts and raisins; toss to combine.
Blend yogurt and salt together, and add to cabbage mixture; toss lightly. Cover, and refrigerate until thoroughly chilled.
