Usage of lexical parameters in D2k Reports


In D2k reports, I need to construct a single report where the query should be changeable at run time.  i.e., "where/order by" shall be added only at run time and it changes according to the discretion of the user.

For e.g:
I have a table called stud_details
(stud_id number, stud_name, varchar2(30), fat_name varchar2(30), class varchar2(12), rank number(2)).

Required functionality:

The user should be able to get the report as he desires, i.e. he can order it by stud_id (or) stud_name (or) rank and so on. Similarly he can change his "WHERE" condition also.

The following is my query in "Query Dialog Box":

=================================================
*****
Select Stud_id, stud_name, rank from stud_details
&where_clause
&order_by
*****

The dialog box said "Two lexical parameters" created.
==================================================

When running the report, it asks for two parameters:

Where_clause      : where stud_name like 'S%'   u
                            (user types here)
order_by      : order by stud_id  
                            (User types here)

I want to have the following clarification:
------------------------------------------
Being developer, I know the "where" and "order by" clauses and also database field names and hence, can type in the parameter field.  But, We cannot expect users to be conversant with oracle/D2k/DB field names. In this situation, how can I make this dynamic report user-friendly? ie., get the parameter values from the user for "where/order by" and concatenate with the report query.

Guys, can I have your help.  Urgent, pls.

Srigupta
sriguptaAsked:
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schwertnerCommented:
You are right.
You have to sort out different cases and to name them in user friendly sentences like

1. Daily report
2. Weekly report
3, department report
........

You have either to pass the parameters 1, 2, 3 from a form to the report or to use a LOV in the parameter form of the Report. After that in a trigger "After parameter Form" analyze the choosen parameter on construct the needed values in the lexical parameters.
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