Help Reqd - on simple sql query

Hi,
I have two tables back_temp_ord_hist, temp_ord_hist of similar structures
create table <table_name>
order_number          varchar2(10),
item_number          integer,
sched_line_number          integer,
dlv_doc_id               varchar2(10),
mtrl_mstr_key          integer,
cust_key               integer,
wrhse_key               integer,
sls_ord_type          varchar2(4)
Now I have inserted same data set in the two tables. (same following three rows in both the tables)
0009032022     160          2     0091383073          27219     1694     20 ZISO
0009032022     160          3     0091383073          27219     1694     20 ZISO
0009032022     160          4     0091383073          27219     1694     20 ZISO
Then I am trying to use a query like below :
     select
          fact.order_number
          , fact.item_number
          , fact.sched_line_number
          , bk_fact.sched_line_number          as old_sched_line_number
          , fact.dlv_doc_id
          ,dbms_utility.get_hash_value(fact.order_number||fact.item_number||fact.sched_line_number||fact.dlv_doc_id,1,100) ord_hist_hash
          ,dbms_utility.get_hash_value(bk_fact.order_number||bk_fact.item_number||bk_fact.sched_line_number||bk_fact.dlv_doc_id,1,100) back_ord_hist_hash
          , fact.mtrl_mstr_key
          , bk_fact.mtrl_mstr_key           as old_mtrl_mstr_key
          , fact.cust_key
          , bk_fact.cust_key                as old_cust_key
          , fact.wrhse_key
          , bk_fact.wrhse_key                as old_wrhse_key
          , fact.sls_ord_type
          , bk_fact.sls_ord_type                as old_sls_ord_type
     from
          temp_ord_hist fact
     join
     back_temp_ord_hist bk_fact
               on fact.order_number = bk_fact.order_number
               and fact.item_number = bk_fact.item_number
               and fact.sched_line_number <> bk_fact.sched_line_number
               and fact.dlv_doc_id = bk_fact.dlv_doc_id
               order by ord_hist_hash, back_ord_hist_hash
But it is actually it is showing 6 rows. But ideally I want no rows as temp_ord_hist.sched_line_number = back_temp_ord_hist.sched_line_number in all the cases over here.
Practically it can be different then I want those rows but when it is same why the output is showing 6 rows.
What I am doing wrong over here?
Regards,
Koushik

Not sure how you are getting 6 rows as the output. I did exactly the same thing that you did and I am getting the only 3 rows as the output:
see below:
SQL> create table temp_ord_hist
2 (
3 order_number varchar2(10),
4 item_number integer,
5 sched_line_number integer,
6 dlv_doc_id varchar2(10),
7 mtrl_mstr_key integer,
8 cust_key integer,
9 wrhse_key integer,
10 sls_ord_type varchar2(4)
11 );
Table created.
SQL> create table back_temp_ord_hist
2 (
3 order_number varchar2(10),
4 item_number integer,
5 sched_line_number integer,
6 dlv_doc_id varchar2(10),
7 mtrl_mstr_key integer,
8 cust_key integer,
9 wrhse_key integer,
10 sls_ord_type varchar2(4)
11 );
Table created.
SQL> insert into temp_ord_hist values ('0009032022',160,2,'0091383073',27219,1694,20,'ZISO');
1 row created.
SQL> insert into temp_ord_hist values ('0009032022',160,3,'0091383073',27219,1694,20,'ZISO');
1 row created.
SQL>
SQL> insert into temp_ord_hist values ('0009032022',160,4,'0091383073',27219,1694,20,'ZISO');
1 row created.
SQL> insert into back_temp_ord_hist values ('0009032022',160,2,'0091383073',27219,1694,20,'ZISO');
1 row created.
SQL> insert into back_temp_ord_hist values ('0009032022',160,3,'0091383073',27219,1694,20,'ZISO');
1 row created.
SQL> insert into back_temp_ord_hist values ('0009032022',160,4,'0091383073',27219,1694,20,'ZISO');
1 row created.
SQL> select
2 fact.order_number
3 , fact.item_number
4 , fact.sched_line_number
5 , bk_fact.sched_line_number as old_sched_line_number
6 , fact.dlv_doc_id
7 ,dbms_utility.get_hash_value(fact.order_number||fact.item_number||fact.sched_line_number||fact.dlv_doc_id,1,100) ord_hist_hash
8 ,dbms_utility.get_hash_value(bk_fact.order_number||bk_fact.item_number||bk_fact.sched_line_number||bk_fact.dlv_doc_id,1,100) back_ord_hist_hash
9 , fact.mtrl_mstr_key
10 , bk_fact.mtrl_mstr_key as old_mtrl_mstr_key
11 , fact.cust_key
12 , bk_fact.cust_key as old_cust_key
13 , fact.wrhse_key
14 , bk_fact.wrhse_key as old_wrhse_key
15 , fact.sls_ord_type
16 , bk_fact.sls_ord_type as old_sls_ord_type
17 from
18 temp_ord_hist fact
19 join
20 back_temp_ord_hist bk_fact
21 on fact.order_number = bk_fact.order_number
22 and fact.item_number = bk_fact.item_number
23 and fact.sched_line_number = bk_fact.sched_line_number
24 and fact.dlv_doc_id = bk_fact.dlv_doc_id
25 order by ord_hist_hash, back_ord_hist_hash
26
SQL> /
0009032022 160 3 3 0091383073 4 4 27219 27219 1694 1694 20 20 ZISO ZISO
0009032022 160 4 4 0091383073 55 55 27219 27219 1694 1694 20 20 ZISO ZISO
0009032022 160 2 2 0091383073 100 100 27219 27219 1694 1694 20 20 ZISO ZISO
SQL>

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Edited by: Sven W. on Oct 23, 2012 1:33 PM

A simple SQL query question

I have an interesting problem and wondering how I can get this result in a single SQL query:
Here is table emp has data with a row for every year since the employee joined with the salary paid that particular year with following columns:
emp (
id varchar2(10),
name varchar2(25),
interested_year date,
salarypaid number(10)
I would like to print the results as follows:
id name previousyear_salarypaid currentyear_salarypaid
x xxxxx xxxxxx xxxxx
Is this possible to do? I have tried to simplify my actual problem so I hope I have included all necessary details.

Just to clarify, the columns mentioned in the results are
previousyear_salarypaid is nothing but
salarypaid where interested_year = '2007'
currentyear_salarypaid is nothing but
salarypaid where interested_year = '2006'

Help Reqd - on simple sql query

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