Error creating job in oracle

Question

I'm having a problem creating a job in oracle . I want at the end of each day to put some values from table1 in table2, empty table1, and then delete and re-create some sequences..because I have auto-increment id and each day I want to sequence to start from 0 again. So long story short I tried creating this job using toad for oracle.
if I just put the first 2 tasks(put data from table1 in table 2, then delete) in the job it works like a charm. if I also add the drop sequence, create sequence I get an error saying
Encountered the symbol "DROP" when expecting one of the following:
begin case declare exit for goto if loop mod null pragma
so this is what I want the job to do:
insert into A(a,b,c) select a2,b2,c2 from B;
delete from A;(so far it would work)
drop sequence ida_seq;
create sequence ida_seq
start with 1
increment by 1
nomaxvalue;
drop sequence idb_seq;
create sequence idb_seq
start with 1
increment by 1
nomaxvalue;
so anybody can give me a clue on why I get the error? maybe if someone can give me a link on how to do oracle jobs..cause if I google "oracle+job" I get only jobs(for work) in oracle...but I don't get stuff related to syntax and how to create jobs in oracle. 10x in advance

Answer 1

If this is a PL/SQL question, then PL/SQL has no 'DROP' or 'CREATE' keywords and you would need to use dynamic SQL with EXECUTE IMMEDIATE.
btw there are various techniques around for resetting a sequence to start again at 1 using ALTER SEQUENCE, rather than dropping and recreating it.