Help Required with an OUTER JOIN Query

Hi,
I need a list of records carrying UserID and ALL SectionIDs and SectionTitles he/she is associated
with so I created following query:
SELECT UsersSections.UserID, Sections.SectionID, Sections.SectionTitle
FROM UsersSections, Sections
WHERE UsersSections.SectionID(+) = Sections.SectionID AND UsersSections.UserID = 1
Where my tables are:
- UsersSections (UserID, SectionID)
- Sections (SectionID, SectionTitle)
The problem is that if I exclude WHERE UserID = '1' clause the query return the desired result i.e. ALL Sections
And ALL Users associated with the any Section(s). But I need results for a particular UserID but
Including WHERE UserID = '1' clause only return records for that User only not the sections he/she belongs to which was the purpose of using OUTER JOIN.
Any help will be highly appreciated.
Thanks.
AKG

userssections.userid (+) = 1

Similar Messages

Help Required in full outer Join

I feel the below query can be changed to full outer join. But, I've not been able to do so.
I require your help in changing it to full outer join. My current query is
SELECT CLAIMNO,'1' INDX FROM D_CLAIM@CMS2PROD
WHERE clntsys=76500 and facility=76501 and filecreatedt='18-feb-2011' and fileupdatedt is null
MINUS
SELECT CLAIMNO,'1' FROM D_CLAIM
WHERE clntsys=76500 and facility=76501 and filecreatedt='18-feb-2011' and fileupdatedt is null
UNION
SELECT CLAIMNO,'2' FROM D_CLAIM
WHERE clntsys=76500 and facility=76501 and filecreatedt='18-feb-2011' and fileupdatedt is null
MINUS
SELECT CLAIMNO,'2' FROM D_CLAIM@cms2prod
WHERE clntsys=76500 and facility=76501 and filecreatedt='18-feb-2011' and fileupdatedt is null

donisback wrote:
I feel the below query can be changed to full outer join. But, I've not been able to do so.
I require your help in changing it to full outer join. My current query is
SELECT CLAIMNO,'1' INDX FROM D_CLAIM@CMS2PROD
WHERE clntsys=76500 and facility=76501 and filecreatedt='18-feb-2011' and fileupdatedt is null
MINUS
SELECT CLAIMNO,'1' FROM D_CLAIM
WHERE clntsys=76500 and facility=76501 and filecreatedt='18-feb-2011' and fileupdatedt is null
UNION
SELECT CLAIMNO,'2' FROM D_CLAIM
WHERE clntsys=76500 and facility=76501 and filecreatedt='18-feb-2011' and fileupdatedt is null
MINUS
SELECT CLAIMNO,'2' FROM D_CLAIM@cms2prod
WHERE clntsys=76500 and facility=76501 and filecreatedt='18-feb-2011' and fileupdatedt is null
I do not think that query is doing what you think that it is doing - on first inspection, it was not doing what I thought either due to the order in which the UNION and MINUS operators are performed. If the FILECREATEDT column is defined as a DATE, your query is relying on an implicit date conversion - in such a case, you should replace:
filecreatedt='18-feb-2011'With:
filecreatedt=TO_DATE('18-feb-2011','DD-MON-YYYY')Now, building a simple model to explain what is happening, we create two tables with 10 rows each. The first table has C1 values that increase by 2, while the second has C1 values that increase by 3:
CREATE TABLE T1 AS
SELECT
ROWNUM*2 C1,
TRUNC(SYSDATE)+ROWNUM*2 C2
FROM
DUAL
CONNECT BY
LEVEL<=10;
CREATE TABLE T2 AS
SELECT
ROWNUM*3 C1,
TRUNC(SYSDATE)+ROWNUM*3 C2
FROM
DUAL
CONNECT BY
LEVEL<=10;It appears that the intended result of your query is to obtain a distinct list of those rows that are in each table that are not in both tables - the UNION ALL minus the intersection of the rows in two tables. However, that is not what you are achieving with that query. To demonstrate, the two halves of your query:
SELECT
C1,
C2
FROM
T1
MINUS
SELECT
C1,
C2
FROM
T2;
C1 C2
2 28-FEB-11
4 02-MAR-11
8 06-MAR-11
10 08-MAR-11
14 12-MAR-11
16 14-MAR-11
20 18-MAR-11
SELECT
C1,
C2
FROM
T2
MINUS
SELECT
C1,
C2
FROM
T1;
C1 C2
3 01-MAR-11
9 07-MAR-11
15 13-MAR-11
21 19-MAR-11
24 22-MAR-11
27 25-MAR-11
30 28-MAR-11As can be seen by the above, each half returned 7 rows - there are 7 rows in each table that is not in the other table. Common sense would state that if we UNION these two results (assuming no duplicate values in each table), we would see 14 rows:
SELECT
C1,
C2
FROM
T1
MINUS
SELECT
C1,
C2
FROM
T2
UNION
SELECT
C1,
C2
FROM
T2
MINUS
SELECT
C1,
C2
FROM
T1;
C1 C2
3 01-MAR-11
9 07-MAR-11
15 13-MAR-11
21 19-MAR-11
24 22-MAR-11
27 25-MAR-11
30 28-MAR-11Only 7 rows? Let's try again with the help of inline views to control the order in which the MINUS and UNION operators are processed:
SELECT
FROM
(SELECT
 C1,
 C2
FROM
 T1
MINUS
SELECT
 C1,
 C2
FROM
 T2)
UNION
SELECT
FROM
(SELECT
 C1,
 C2
FROM
 T2
MINUS
SELECT
 C1,
 C2
FROM
 T1);
C1 C2
2 28-FEB-11
3 01-MAR-11
4 02-MAR-11
8 06-MAR-11
9 07-MAR-11
10 08-MAR-11
14 12-MAR-11
15 13-MAR-11
16 14-MAR-11
20 18-MAR-11
21 19-MAR-11
24 22-MAR-11
27 25-MAR-11
30 28-MAR-11Note that the above returned 14 rows. We can do the same using just two outer joins:
SELECT
T1.C1,
T1.C2
FROM
T1,
T2
WHERE
T1.C1=T2.C1(+)
AND T2.C1 IS NULL
UNION
SELECT
T2.C1,
T2.C2
FROM
T1,
T2
WHERE
T2.C1=T1.C1(+)
AND T1.C1 IS NULL;
C1 C2
2 28-FEB-11
3 01-MAR-11
4 02-MAR-11
8 06-MAR-11
9 07-MAR-11
10 08-MAR-11
14 12-MAR-11
15 13-MAR-11
16 14-MAR-11
20 18-MAR-11
21 19-MAR-11
24 22-MAR-11
27 25-MAR-11
30 28-MAR-11Or we can do it with a full outer join and a MINUS operator:
SELECT
NVL(T1.C1,T2.C1) C1,
NVL2(T1.C1,T1.C2,T2.C2) C2
FROM
T1 FULL OUTER JOIN T2
 ON T1.C1=T2.C1
MINUS
SELECT
T1.C1,
T1.C2
FROM
T1,
T2
WHERE
T1.C1=T2.C1;
C1 C2
2 28-FEB-11
3 01-MAR-11
4 02-MAR-11
8 06-MAR-11
9 07-MAR-11
10 08-MAR-11
14 12-MAR-11
15 13-MAR-11
16 14-MAR-11
20 18-MAR-11
21 19-MAR-11
24 22-MAR-11
27 25-MAR-11
30 28-MAR-11Or just with a full outer join with a WHERE clause:
SELECT
NVL(T1.C1,T2.C1) C1,
NVL2(T1.C1,T1.C2,T2.C2) C2
FROM
T1 FULL OUTER JOIN T2
 ON T1.C1=T2.C1
WHERE
(T1.C1 IS NULL
 OR T2.C1 IS NULL);
C1 C2
3 01-MAR-11
9 07-MAR-11
15 13-MAR-11
21 19-MAR-11
24 22-MAR-11
27 25-MAR-11
30 28-MAR-11
8 06-MAR-11
20 18-MAR-11
2 28-FEB-11
10 08-MAR-11
4 02-MAR-11
14 12-MAR-11
16 14-MAR-11With the above knowledge, you should be able to fix your SQL statement to produce the expected results.
Charles Hooper
Co-author of "Expert Oracle Practices: Oracle Database Administration from the Oak Table"
http://hoopercharles.wordpress.com/
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc.

Left outer join query

Hi Experts,
 I am facing a problem with left outer join query. Am using one standard table and ztable for this join. My problem is values are not extracted from the Ztable.
Query:
 SELECT b~lifnr b~belnr b~gjahr b~xblnr b~shkzg b~blart b~zfbdt b~budat b~wrbtr
 b~wskto b~zlspr s~EXTRACT_STATUS s~maturity_date FROM bsik AS b
 LEFT OUTER JOIN zprm_rvne_sapdoc AS s
 ON s~belnr EQ b~belnr
 AND s~gjahr EQ b~gjahr
 INTO CORRESPONDING FIELDS OF TABLE it_join
 WHERE b~zlsch = p_zlsch
 AND b~xblnr IN so_invno
 ORDER BY b~lifnr b~xblnr.
I have all entries of BSIK table in Ztable with extract status as Y but this query is not fetching extract status and maturity date of ztable so it is blank in the internal table.
Need solution.
Regards
Sridevi S

Hi,
see the sample wiki for writing the Left outer join
http://wiki.sdn.sap.com/wiki/display/Snippets/EmployeeInfotype0000to9999ChangeHistory
Specifying Two or More Database Tables as a Left Outer Join
The left outer join, on the other hand, reads lines from the left-hand database table or join even if there is no corresponding line in the right-hand table.
SELECT...
FROM <tab> LEFT [OUTER] JOIN <dbtab> [AS <alias>] ON <cond>
 <options>
<tab> and <dbtab> are subject to the same rules and conditions as in an inner join. The OUTER addition is optional. The tables are linked in the same way as the inner join with the one exception that all lines selected from <tab> are included in the final selection. If <dbtab> does not contain any lines that meet the condition <cond>, the system includes a single line in the selection whose columns from <dbtab> are filled with null values.
In the left outer join, more restrictions apply to the condition <cond> than in the inner join. In addition to the above restrictions:
EQ or = is the only permitted relational operator.
There must be at least one comparison between columns from <tab> and <dbtab>.
The WHERE clause may not contain any comparisons with columns from <dbtab>. All comparisons using columns from <dbtab> must appear in the condition <cond>.
If we have two tables named stud1,stud2 with the following data
Stud1: id Name stud2: id Name
1 xxx 1 aaa
2 yyy 2 bbb
3 zzz 4 ccc
4 www 6 ddd
When we use Left Outer Join we get the output as:
1 aaa
2 bbb
3 <Null>
4 ccc
When we use Right Outer Join we get the output as:
1 aaa
2 bbb
4 ccc
<Null> ddd
When we use Full Outer Join we get the output as:
1 aaa
2 bbb
3 <Null>
4 ccc
<Null> ddd
Prabhudas

Query with multiple outer joins

I had a doubt with whether the following kind of query is valid with multiple outer-joins. The format of the query is something like this:-
select A.col1, B.col2
from table1 A, table2 B, table3 C where
A.col3=B.col4(+) and B.col5=C.col6(+)
This would mean the follwoing with regard to outer-joins in the query.
1) fetch records with col3 in table A matching or not matching col4 in table B
2) fetch records with col5 in table B matching or not matching col6 in table C
So, this query is valid?
I hope, my question is clear.
Please, help in solving the doubt.
regards

This is valid and it works fine

On outer Join Query

Hi All,
I have a outer join query which is creating bottlenecks and increasing the cost of the query, the plan of the query is pretty awkward with multiple nested outer loop joins. Though its the requirement for me to write such a query. I would like to get advice from the SQL community to know whether we can rewrite the query in any other way so that it reduces the cost and there is considerable improvement in the plan.
For example can we rewrite this query to ensure we get the same output with much improved plan and cost.
Basically i want to avoid thsi left Outer Join. Can we do this any way with lesser cost and consistent gets.
Here is a sample query.
Select e.Empno,e.Ename,e.Sal, D.Dname,D.deptno
From
Emp e, Dept d
Where e.Deptno(+) = d.Deptno
Thanks in advance

You haven't given us much to work with, not even your Oracle version. So, start with these:
When your query takes too long
When your query takes too long ...
How to Post a SQL statement tuning request
HOW TO: Post a SQL statement tuning request - template posting

How to have a condition with the outer join

Hi, I'd like to know if, inside a report, there's a way to create a condition which include in some way an outer join.
So, I have 2 custom folders:
Tickets with 2 fields: Ticket_id, Inventory_item_id, category_id and iptv_sumptom
Hierarchy with 4 fields: Symptom, Inv_item_id, Category_id and Group
These 2 folders are joined in this way
Tickets.inventory_item_id = Hierarchy.inv_item_id (+) AND Tickets.category_id = Hierarchy.category_id (+) AND Tickets.iptv_sumptom = Hierarchy.Symptom (+)
Now, from the report I have a parameter based on the field Group to restrict dataset of the tickets.
...but when I choose a group and I run the report, the conditions inside the plsql query generated is like this
WHERE (Tickets.inventory_item_id = Hierarchy.inv_item_id (+) AND Tickets.category_id = Hierarchy.category_id (+) AND Tickets.iptv_sumptom = Hierarchy.Symptom (+)) AND Hierarchy.Group = 'A'
where the last condition is WITHOUT outer join !
I need to have also the outer join on the Hierarchy.Group: AND Hierarchy.Group (+) = 'A', but from the Administrator I don't want to add another join with (+) for the Group. From Plus I didn't find any way to write (+).....
Anybody knows another method or workaround to have also a filter (the condition Hierarchy.Group = 'A') with an outer join ?
Thanks in advance
Alex

Hi,
A workaround can be either use new objects or modify the existing ones to avoid the outer join.
In order to do that you can add a dummy record to each custom folder and then join by it.
For example if you will add to the
Tickets will be:
select Ticket_id, Inventory_item_id, category_id, iptv_sumptom
from......
union all
select -1,-1,-1,'Some value' from dual
And hierarchy will be:
select Symptom, Inv_item_id, Category_id ,Group
from......
union all
select 'Some value',-1,-1,'Some value' from dual
Now you can create a full join between them without the need to outer join.
Hope it will help
Tamir

Update Statement with left outer join

hi,
i have to update a column in table "a" from table "b" and both of them joined with left outer join
How can I do this
Thanks in Advance

Please consider the following when you post a question. This would help us help you better
1. New features keep coming in every oracle version so please provide Your Oracle DB Version to get the best possible answer.
You can use the following query and do a copy past of the output.
select * from v$version 2. This forum has a very good Search Feature. Please use that before posting your question. Because for most of the questions
that are asked the answer is already there.
3. We dont know your DB structure or How your Data is. So you need to let us know. The best way would be to give some sample data like this.
I have the following table called sales
with sales
as
 select 1 sales_id, 1 prod_id, 1001 inv_num, 120 qty from dual
 union all
 select 2 sales_id, 1 prod_id, 1002 inv_num, 25 qty from dual
select *
from sales 4. Rather than telling what you want in words its more easier when you give your expected output.
For example in the above sales table, I want to know the total quantity and number of invoice for each product.
The output should look like this
Prod_id sum_qty count_inv
1 145 2 5. When ever you get an error message post the entire error message. With the Error Number, The message and the Line number.
6. Next thing is a very important thing to remember. Please post only well formatted code. Unformatted code is very hard to read.
Your code format gets lost when you post it in the Oracle Forum. So in order to preserve it you need to
use the {noformat}{noformat} tags.
The usage of the tag is like this.
<place your code here>\
7. If you are posting a *Performance Related Question*. Please read
 {thread:id=501834} and {thread:id=863295}.
 Following those guide will be very helpful.
8. Please keep in mind that this is a public forum. Here No question is URGENT.
 So use of words like *URGENT* or *ASAP* (As Soon As Possible) are considered to be rude.

Help required with (soundcard) connection / settings, thanks in advan

Help required with connection / settings between a Creative Sound Blaster Audigy Platinum EX (soundcard) and a Creative DTT3500 Digital (5. speakers).
The problem
No sound from any of the speakers. (Exception can plug in headphones at front)
Background
My computer has been recently upgraded at my local computer shop and all programs re-installed (including driver update from Creative's website). However after reconnecting speakers and restoring the original settings I?m getting no sound from any of the speakers. I?ve followed all the available advice/instructions I can find on this website and manuals to no avail.
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Physical
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Software
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What is IS NULL doing in replacing NOT EXISTS operator with an outer join?

DB version:10gR2
An example from searchoracle.target.com
The query which contains a NOT EXISTS operator
SELECT M.ModulId, M.Modul FROM MODULE M
WHERE NOT EXISTS
( SELECT PROJEKTMODUL.IdModul
FROM PROJEKTMODUL
WHERE M.ModulId = PROJEKTMODUL.IdModul
AND PROJEKTMODUL.IdProjekt = 23 )is replaced by an equivalent outer join query
select distinct
       M.ModulId
     , M.Modul
from MODULE M
left outer
join PROJEKTMODUL
    on M.ModulId = PROJEKTMODUL.IdModul
   and PROJEKTMODUL.IdProjekt = 23
where PROJEKTMODUL.IdProjekt is nullI don't understand what
PROJEKTMODUL.IdProjekt is nullis doing in the above rewritten query.

It is to perform an Anti-Join. As far as I know Oracle (starting with release 10g - I thought Release 1) rewrites your NOT EXISTS and NOT IN query to a Anti Join which looks like your second query.
Look at the results of the query without the IS NULL predicate and see which records (from that set) should be selected to show the same results as the first query. The records of interest match the predicate IS NULL.

BI 7.0 Infoset - Infocube - Left outer join - query

Hi Expert,
A infoset contain Infocube and ODS, linked with left outer join, common fields are PO,PO item. PO account assignment ODS have three keyfields: PO Doc.,Item,account Assignment .
 PO Infocube PO Account Assignment ODS
PO PO item AmtPO Doc. Item AccAssignment Cost object
1000 10 230 1000 10 1 CC1
1001 10 250 1002 10 1 CC1
1002 10 150 1002 10 2 CC2
in BEx result are like this:
1000 10 230 1 CC1
1001 10 250 # #
1002 10 150 1 CC1
1002 10 150 2 CC2 ( amount only duplicated)
The issue was that amount gets duplicated. It only occurs if PO has more than one account assignment.
In report, we want show like this
1000 10 230 1 CC1
1001 10 250 # #
1002 10 150 1 CC1
1002 10 # 2 CC2
Any suggestion or input to overcome this issue?
Thanks,
Saran
Message was edited by:
 Saravanan K

Hi,
did you solve your problem? because I have the same issue right now: the left outer join doesn't seem to do its job.
Let me know if you have found a solution, it would be appreciated.
have a nice day,
Dominic

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Query with FULL OUTER JOIN , help pleaseeeeeeeeeeee...

Hi everyone,
I'm trying to write a query for a report in Oracle SQL, but i just can't figure out how to do it.
I'm using Oracle 10g release 1.0 database and i execute my queris in SQL* PLUS ( eventually i'm gonna use them in Oracle Report Builder ) .
here's what i have:
i have four tables that are used for our inventory application. lets call them INCOMMING , INCOMMING_ITEMS , OUTGOING , OUTGOING_ITEMS.
as you may have guessed , INCOMMING_ITEMS is the detail table for INCOMMING ( joined by IID column) and also OUTGOING_ITEMS is the detail table for OUTGOING ( joined by OID column ).
here is the structure of them :
INCOMMING
IID varchar2
CDATE date
INCOMMING_ITEM
IID varchar2
PART_NO number
QTY number
OUTGOING
OID varchar2
CDATE date
OUTGOING_ITEM
OID varchar2
PART_NO number
QTY number
now , the query i want, should return part_no , cdate , sum of OUTGOING qty , sum of INCOMMING qty .
the result of the query should be sth like this :
part_no     cdate     O_qty     I_qty
100     01/05/06     10     0
100     01/05/07     20     60
200     01/06/02     0     50
300     01/06/02     30     40
this means that for some dates and for some parts, i may not have INCOMMING or OUTGOING data, but if at least one of the 2 last columns has a non-zero data, i should show the row ( like the first and third rows of my example result), and if both have data for the same PART_NO and the same CDATE, both should be showed in the same row. ( like the second row in my example result)
i tried so much and came up with several huge and also time consuming queries, but then i read abt FULL OUTER JOIN somewhere and tried using that. here is what i came up with :
SELECT
PART_NO , CDATE , sum(II.QTY) I_QTY , SUM (OI.QTY) O_QTY
FROM
     (OUTGOING O INNER JOIN OUTGOING_ITEM OI USING ( OID ) )
FULL OUTER JOIN
     (INCOMMING I INNER JOIN INCOMMING_ITEM II USING ( IID ) )
ON ( I.CDATE = O.CDATE AND II.PART_NO = OI.PART_NO)
WHERE
I.CDATE = :PARAMETER1
AND O.CDATE = :PARAMETER1
GROUP BY
PART_NO , CDATE
this query is short and fast , but the results r not what i expected. i mean, although i have used FULL OUTER JOIN in the query , but the results i get r sth like this :
part_no     cdate     O_qty     I_qty
100     01/05/07     20     60
300     01/06/02     30     40
which means only the rows that has both values are returned.
any change i make to this query would make the SQL* PLUS hang , like when i use the cartesian product of two large tables, so i guess my changes wheren't in the right direction.
i think its possible to write this query using FULL OUTER JOIN syntax, but i just can't find it.
Can anybody pleaseeeeeeeeeeeee help me?
thanx in advance,
Maryam.

Note: I wrote this on the fly -- hope there is no syntax errors, otherwise forgive me -- but you get the idea..
select
fromUnionAll.cdate, fromUnionAll.part_no,
sum(fromUnionAll.O_qty) O_qty,
sum(fromUnionAll.I_qty) I_qty
from
select
iinner.cdate, iinner.part_no, 0 O_qty, iinner.I_qty
from
select
i.cdate, ii.part_no,
/* added the case only for the extreme case when there is
no record anywhere for the given CDATE in INCOMMING_item */
sum( ( case when ii.qty is not null then ii.qty else 0 end) ) I_qty
from
incomming i,
incomming_item ii
where
i.iid = ii.iid (+)
group by i.cdate, ii.part_no
) iinner
union all
select
oinner.cdate, oinner.part_no, oinner.O_qty, 0 I_qty
from
select
o.cdate, oi.part_no,
/* added the case only for the extreme case when there is
no record anywhere for the given CDATE in OUTGOING_item */
sum( ( case when oi.qty is not null then oi.qty else 0 end) ) O_qty
from
outgoing o,
outgoing_item oi
where
o.oid = oi.oid (+)
group by o.cdate, oi.part_no
) oinner
) fromUnionAll
group by fromUnionAll.cdate, fromUnionAll.part_no;
--Samson

Need help with an Outer Join

I have the following query which has an outer join and it works perfectly and shows publication paragraph which don't have any maintenance records with a value of 0.
However when I add to the where clause conditions such as lpm.fac_ident and lpm.start_date, the null values no longer show up in the query(see second SQL statement).
I am new at SQL and am just trying to make this outer join work. Any help would be appreciated.
-- THIS WORKS
SELECT m.publication_paragraph, pm.description, pm.frequency, count(l.publication_paragraph) ACTIVITIES_PERFORMED
FROM lpm_paragraph_mapping_table m, lpm l, pm_requirements_table pm
WHERE m.paragraph_alias_mapping = l.publication_paragraph (+)
GROUP BY m.publication_paragraph, pm.description, pm.frequency
order by count(l.publication_paragraph);
-- THIS DOES NOT WORK
SELECT m.publication_paragraph, pm.description, pm.frequency, count(l.publication_paragraph) ACTIVITIES_PERFORMED
FROM lpm_paragraph_mapping_table m, lpm l, pm_requirements_table pm
WHERE m.paragraph_alias_mapping = l.publication_paragraph (+)
AND l.fac_ident = 'EWR' AND TO_CHAR(l.start_date, 'YYYY') = '2010'
GROUP BY m.publication_paragraph, pm.description, pm.frequency
order by count(l.publication_paragraph);
Edited by: George Heller on Jun 30, 2011 9:47 AM

fabio_silva wrote:
Hi,
I just didn't get. The table (pm_requirements_table pm) haven't any join ???
Regards,Forgive the ASCII art, but your query looks like:
---------- JOIN ----------
| Alias M | ====> | Alias L |
| Alias PM |
----------- The table pm_requirements_table is not joined at all. Unless it has only a single row, then your resultset will have 1 row for each row in lpm_paragraph_mapping_table (because of the outer join) times the number of rows in pm_requirements_table. Consider this simplified example.
SQL> select * from t;
        ID DESCR
         1 T 1
         2 T 2
SQL> select * from t1;
        ID DESCR
         1 T1 1
         2 T1 2
         3 T1 3
         4 T1 4
SQL> select 1.id, t.descr, t1.descr
2 from t, t1;
        ID DESCR      DESCR
         1 T 1        T1 1
         1 T 1        T1 2
         1 T 1        T1 3
         1 T 1        T1 4
         1 T 2        T1 1
         1 T 2        T1 2
         1 T 2        T1 3
         1 T 2        T1 4Here, my table t is the result from your join between lpm_paragraph_mapping_table and lpm. My table t1 is your pm_requirements_table. You need something more like:
SQL> select 1.id, t.descr, t1.descr
2 from t, t1
3 where t.id = t1.id;
        ID DESCR      DESCR
         1 T 1        T1 1
         1 T 2        T1 2Assuming you fix that join, you can use a sub-query to apply the predicates to the lpm as Centinul showed, or, if you are on a current version of Oracle, use ANSI join syntax wich would look something like:
SELECT m.publication_paragraph, pm.description, pm.frequency,
        count(l.publication_paragraph) ACTIVITIES_PERFORMED
FROM lpm_paragraph_mapping_table m,
   LEFT JOIN lpm l,
      ON m.paragraph_alias_mapping = l.publication_paragraph and
         l.fac_ident = 'EWR' AND
         TO_CHAR(l.start_date, 'YYYY') = '2010'
   JOIN pm_requirements_table pm
      on something
GROUP BY m.publication_paragraph, pm.description, pm.frequency
ORDER BY count(l.publication_paragraph);Leaving aside the missing join, the reason why your query as posted does not work is that when there is not a match on m.paragraph_alias_mapping = l.publication_paragraph Oracle will "make up" rows form lpm with all null columns for each row in lpm_paragraph_mapping_table where there is no match. So, when you compare those made up rows from lpm, you are effectively saying where NULL = 'EWR' and TO_CHAR(NULL, 'yyyy') = '2010'. Null is never equal to anything. Any comparision against null is unknown, so the made up rows get filtered out by your predicate.
John

SQL Query Assistance Required for Full Outer Join

Hi,
Lets say I have two tables, i.e:
TAB_A (colA1, colA2, colA3, colA4)
TAB_B (colB1, colB2, colB3, colB4) where colB2 is a FK to colA1
I am after an SQL query that will cater for both the following two scenarios.
Scenario 1:
TAB_A has two rows of data, i.e
(1, ABC100, 1, WG_A)
(2, ABC100, 2, WG_B)
TAB_B has one row of data, i.e
(1, 1, EMP_222, 4)
I use the following SQL:
select a.*, b.*
from tab_a a FULL OUTER JOIN tab_b b ON (a.colA1 = b.colB2)
where a.colA2 = 'ABC100'
This returns two rows:
1, ABC100, 1, WG_A, 1, 1, EMP_222, 4
2, ABC100, 2, WG_B
Now, what I actually would like my query to do is actually only return the row where a tab_b record exists, i.e, should only return one record:
1, ABC100, 1, WG_A, 1, 1, EMP_222, 4
This I can achieve by using a RIGHT OUTER JOIN instead above, but this causes issue with my scenario 2, which is the following set-up
Scenario 2:
TAB_A has only one row of data this time, i.e
(2, ABC100, 2, WG_B)
TAB_B has no data at all this time
This returns no rows but I actually now want this single record from tab_a returned.
I basically require an SQL query that will cater for both the top 2 scenarios, i.e, if a tab_b record exists from the outer join then only return this record along with tab_a data. If a tab_b record doesn't exist, then only return the tab_a record.
Hope the above makes sense.
Thanks.

Is it what you need (not very elegant) ?
SQL> select * from t_outer;
        ID CODE
         1 100
         2 100
SQL> select * from t_inner;
no rows selected
SQL> with tab1 as (
2 select a.id a_id, a.code, b.id b_id from t_outer a join t_inner b on
3 (a.id = b.id and a.code = '100'))
4 select * from tab1
5 union all
6 select a.*, null from t_outer a where not exists (
7 select 1 from tab1)
8 and a.code = '100'
9 /
      A_ID CODE             B_ID
         1 100
         2 100
SQL> insert into t_inner values(2);
1 row created.
SQL> with tab1 as (
2 select a.id a_id, a.code, b.id b_id from t_outer a join t_inner b on
3 (a.id = b.id and a.code = '100'))
4 select * from tab1
5 union all
6 select a.*, null from t_outer a where not exists (
7 select 1 from tab1)
8 and a.code = '100'
9 /
      A_ID CODE             B_ID
         2 100                 2
Rgds.

Help Required with an OUTER JOIN Query

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