Procedure doesn`t like 'distinct'

Question

Hi,
Ive written a simple procedure so that a job runs at a certain time every week,but i noticed that the job was being done more than once every week...and that this was due to more than one sysdate in the database.When I select sysdate from dual i get back a sysdate for every row in the table(even though these sysdate times are all identical)...therefore i want to have a 'distinct' sysdate in my procedure.
This procedure works,but it gets done alot more times than once,and i only want it done once.
BEGIN
dbms_job.submit(weekly_job ,'JOB;',
trunc(sysdate)+11/24,
'trunc(sysdate)+7+11/24' );
COMMIT;
Here I have added a 'distinct' in the same procedure but it doesnt like it,and it wont work.
BEGIN
dbms_job.submit(weekly_job ,'JOB;',
distinct(trunc(sysdate)+11/24),
'distinct (trunc(sysdate)+7+11/24)' );
COMMIT;
Does anyone know an alternative or solution?
Thanks,
Brian.

Answer 1

Brian,
Your answer can be found in the "PL/SQL Packages and Types Reference" at:
http://otn.oracle.com/pls/db10g/portal.portal_demo3?selected=3#index-SQL
In summary: exec dbms_job.remove(jobno);
But please download that doc and keep it handy. Grab the SQL Reference, PL/SQL Guide, and Application Developers Fundamentals while you're at it.
user_jobs is a data dictionary view (dba_, all_, user_, etc). You never, ever want to insert, update, or delete anything in the data dictionary. This includes dual. Want to destroy a database? Login as sys and delete from dual. Don't do it, just trust me.
Thanks,
Tyler