1. String Concatination problems

2. Efficient string concatination

3. Concatination of strings

4. string concatination

5. concatination question?

6. concatination!!!!!??????

7. Custom aggregate function

8. Aggregate functions

9. new type of aggregate function (product function)

10. Domain Aggregate Function problem

11. Domain Aggregate function to return Collection/array

12. Help coding an aggregate dSum function