that was very enlightening.
thank you very much
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i have an oracle(6i) report based on something similiar to this:
SELECT * FROM emp
WHERE dept_no = :p_dept
and the parameter p_dept list value is based on the following query:
SELECT distinct dept_no, dept_name FROM dept
and it works fine, every time i call the report from the form (6i) i get the list box and i can choose which department's employees to display.
I also want to have the option to display all employees from all departments.
how can I modify the SELECT statement to achieve this.
thanks
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by: FVERPosted on 2009-08-07 at 01:49:54ID: 25040854
Hi,
Assuming dept_no is a number datatype and 0 is not an existing department number, you can change the query to
SELECT * FROM emp
WHERE dept_no = :p_dept
OR :p_dept = 0
And change the query that retrieves the possible values to :
SELECT dept_no, dept_name FROM dept
UNION
SELECT 0, 'All departments' FROM DUAL
ORDER BY dept_no