Stored Proc's/Packages Help

Question

Ok all, again, being new to Oracle and trying to do a humble favor for a friend, I've come up with a problem that I'll need help on. Running these steps individually gets me pretty much the result that I'm looking for, minus some basic retooling with TSQL. However, I've tried to format this in the form of either a package/procedure and I just don't believe I'm doing it right. I've been reading the PL-SQL for Dummies, in addition to the latest Oracle 10G PDFs, but as much as I try, I just can't format the package right, even using v_ types and declaring. Below is the code, and even though I've listed tables, this has to be done dynamically and/or processed in memory. I know this may seem simple at best to those of you who understand Oracle, but to me, it's like a square peg in a round hole.
Would appreciate any and all comments and assistance. Thank you kindly for your perusal of this post (code below):
--STEP 1:
create table tbl1 as
SELECT ps.id1
,ps.id2
,ps.tdate
,NVL(ps.udate, SYSDATE + 1 )
,ps.tcode
,decode (y.nmtext,
'name1', 'nm1',
'name2', 'nm2',
'name3','nm3',
'name4','nm4',
'name5','nm5',
'name6','nm6',
'name7','nm7',
'name8','nm8')
,(SELECT COUNT(ps2.id1)
FROM tblhere ps2
WHERE ps2.id1 = ps.id1
AND ps2.id2 = ps.id2
AND ps2.tdate <= TO_DATE('03/01/2007 00:00:00', 'MM/DD/YYYY HH24:MI:SS')
AND NVL(ps2.udate, SYSDATE + 1) >= TO_DATE('02/01/2007 00:00:00', 'MM/DD/YYYY HH24:MI:SS')
GROUP BY ps2.id2) AS o_cnt
,(SELECT COUNT(ps3.id1)
FROM tblhere ps3
WHERE ps3.id1 = ps.id1
AND ps3.tcode = ps.tcode
AND ps3.tdate <= TO_DATE('03/01/2007 00:00:00', 'MM/DD/YYYY HH24:MI:SS')
AND NVL(ps3.udate, SYSDATE + 1) >= TO_DATE('02/01/2007 00:00:00', 'MM/DD/YYYY HH24:MI:SS')
GROUP BY ps3.tcode) AS a_cnt
,y.ntype as ntype
FROM tblhere ps
INNER JOIN tblz y
ON ps.id2 = y.thisid
WHERE ps.tdate <= TO_DATE('03/01/2007 00:00:00', 'MM/DD/YYYY HH24:MI:SS')
AND NVL(ps.udate, SYSDATE + 1 ) >= TO_DATE('02/01/2007 00:00:00', 'MM/DD/YYYY HH24:MI:SS')
AND tcode = 'placedhere'
AND y.ntype='testing'
order by id1, tdate
--STEP 2:
create table overages (
Mynum number,
MyID number)
--STEP 3:
insert into overages
select count(*) as Mynum, id1
from tbl1
group by id1
having count(id1) > 1
order by id1 desc
--STEP 4:
create table tbl2 (
nums number,
cid number,
ogid number,
adate date,
rdate date,
timer number,
mymode varchar2(10 Byte),
place varchar2(50 Byte),
og_cnt number,
mymode_cnt number,
namer varchar2(1 Byte))
--STEP 5:
insert into tbl2
select b.mynum, a.id1, a.id2,
a.tdate, NVL(a.udate, SYSDATE + 1),
a.tcode, a.nmtext, a.o_cnt,
a.a_cnt, a.ntype
from tbl1 a
inner join overages b
on a.id1 = b.myid
order by cid, adate
--STEP 6:
merge into tbl2 a
using (select rwd,
cid,
ogid,
min(rwd) over (partition by cid, adate, rdate) rwd_min,
adate,
rdate,
mymode, place,
from (select cid, rowid rwd,
last_value(d1 ignore nulls) over (partition by cid order by rdate range between unbounded preceding and current row) as adate,
first_value(d2 ignore nulls) over (partition by cid order by rdate range between current row and unbounded following) as rdate
from (select cid,
adate,
rdate,
case when abs(adate-lag(rdate) over (partition by cid order by rdate))<=1
then null else adate end d1,
case when abs(rdate-lead(adate) over (partition by cid order by rdate))<=1
then null else rdate end d2
from tbl2))) b
on (a.rowid=b.rwd)
when matched then update set a.adate=b.adate, a.rdate=b.rdate
delete where b.rwd!=b.rwd_min;

Answer 1

In general you should create the empty tables first as an installation step. Then in your PL/SQL code you would just do inserts, updates etc.
Also, a package is defined in two parts:
CREATE OR REPLACE PACKAGE whatever
AS
    PROCEDURE p
        ( p_someparam INTEGER );
    FUNCTION q
        RETURN BOOLEAN;
END whatever;
CREATE OR REPLACE PACKAGE BODY whatever
AS
    PROCEDURE p
        ( p_someparam INTEGER )
    IS
    BEGIN
        dbms_output.put_line('Hello, World');
    END p;
    FUNCTION q
        RETURN BOOLEAN
    IS
    BEGIN
        RETURN dbms_random.value(0,10) < 5;
    END q;
END whatever;
/