PL/SQL

I need help with the following:

Part1: I am trying to develop a PL/SQL Package stored within a database to accept input data for single distance calculations. i need to write a procedure that will accept two sets of x and y coordinates as input. The procedure will then output the distance between the points in km. Can anyone help as I am new to PL/SQL?
The distance between two points (in two-dimensional world) is SQRT(POWER(x2 - x1,2) + POWER(y2 - y1,2)).

Part2: I am trying to develop a PL/SQL Procedure for multiple distance calculatons which will take input from a single database table and output results to another database table. The input and output tables must be specified as part of the procedure call. The procedure must calculate distances between all locations specified in the input table and will allow the user to specify the calculation of distances in both directions if required. So for 10 locations in the input table, this will result in 100 distance calculations or 50 calculations if only one direction is required. The procedure will accept as input a flag to indicate whether or not distances are to be calculated in one direction only or in both directions from one point to another. The return flag will accept 'Y' or 'N' as its values.
The table names are 'Location' and 'Dist' Location Table (Input Table)
Id_number
Region
Name
Code
X
Y
Done

Dist Table (Output table)
From_id
To_id
Distance

Part3:
For multiple distance calculations a second procedure must be developed to alow the use of 2 input tables. This procedure will calculate distances between all the records in table 1 and the records in table 2 i.e. it will calculate distances between location 1 in table 1 and all the locations in table 2 , then between location 2 in table 1 and all the locations in table 2, then between location 3 in table 1 and all the locations in table 2 and so. Again this procedure will output results to a database table. The format of this procedure call might be: Procedure_call (input_table1, input_table2, output_table).

Please reply to--
paul.kolbohm_at_mallontechnology.com Received on Thu Feb 22 2001 - 11:16:30 CST