18. The system of claim 15 wherein the second set of SQL statements comprises: a query statement for selecting a record having a value of a foreign key field of the second table equal to a value of a target key field in the first result set.
15. The system of claim 14 further comprising: querying means for querying the parent table using the set of SQL statements to produce the first result set; and using means for using the first result set in constructing a second set of SQL statements to query the child table, wherein the second set of SQL statements comprises SQL statements other than a second statement that joins the second table to another table, and the querying means and the using means reside in the memory unit.