Problem in passing parameters

Question

i have used 4 parameters to take a report
like
empno=parameter1
sal=parameter2
mgr=parameter3
if i want to make a report that have empno=10
sal=2300 and mgr=230
them simply we used on the report with
select=======
where empno=:parameter1 and sal=:parameter2 and mgr=:parameter3;
The PROBLEM IS HERE THAT IF I WANT TO TAKE REPORT ONLY BY EMPNO THEN OTHERE TWO LEFT BLANK AND THE REPORT SHOWS NOTHING AND IF I USED "OR" OPERATOR INSTEAD OF "AND"
select=======
where empno=:parameter1 OR sal=:parameter2 OR mgr=:parameter3;
THEN IT GOT ALL THE EMPNO ,ALL SAL AND AL MGR
SO PLEASE SOLVE MY PROBLEM HOW CAN I DO THAT TO TAKE AS MUCH PERMATER AS I REQUIRED AT THE TIME OF REPORTING
IF U HAVE ANY QUERY OR SOLUTION THEN reply me or SEND ME ON THIS MAIL
[email protected]
thank you
imran
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Answer 1

hello,
there are two approaches :
1) re-phrase your query as follows
select ... where (empno = :p1 or :p1 is null) and (sal = :p2 or :p2 is null) ....
2) use lexicals for the whole where-clause
define a user parameter e.g. myWhereClause and assign the text of the where-clause you want to apply (including the where keyword).
re-phrase your query :
select ... &myWhereClause
this will enable you to have a changable where-clause at runtime ! you can change it in the after-parameterform-trigger and create a where-clause accroding to the passed parameters.
regards,
the oracle reports team
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