Outer Join Q - Help pls

Hi guys,.
I hope everyone had a nice Easter. I have a question about my request. Here are my paintings,
STUDENT TABLE:
ID               NAME
123             JIM SMITH
456             KEN TWIST

EMAIL_TABLE:
ID              EMAIL_CODE           EMAIL_ADDRESS
123            AA                         [email protected]
123            AA                         [email protected]
123            BB                         [email protected]
456            BB                        [email protected] 

OUTPUT:
ID      NAME           EMAIL_ADDY1     EMAIL_ADDY2
123   JIM SMITH     [email protected]   [email protected]
456   KEN TWIST  
Here's my query:
select s.ID,
         s.NAME
         max(a.EMAIL_ADDRESS) email_addy1,
         min(b.EMAIL_ADDRESS) email_addy2
  from student s, email_tab a, email_tab b
 where a.id = s.id
   and a.email_code = 'AA'
   and b.id = s.id
   and b.email_code = 'AA'
   and a.id = b.id
   and a.email_code = b.email_code
group by ID, NAME
My question is, with this query, I get only students who has a code of 'AA' e-mail, I also want to show students without the 'AA' code, but e-mail will be empty.

Thank you very much.


Amy

Published by: user5737516 on April 12, 2012 07:12

One way, which is a slight adaptation of your code...

select s.ID,
         s.NAME
         max(case when a.email_code = 'AA' then a.EMAIL_ADDRESS else null end) email_addy1,
         min(case when b.email_code = 'AA' then b.EMAIL_ADDRESS else null end) email_addy2
  from student s, email_tab a, email_tab b
 where a.id = s.id
   and b.id = s.id
   and a.id = b.id
   and a.email_code = b.email_code
group by ID, NAME

Tags: Database

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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

    Something like:

    select nvl(p.claimno,s.claimno) claimno,
       nvl2(p.claimno,'PROD','STAGING') the_source,
       :the_clntsys clntsys,
       :the_facility facility
  from (select claimno
          from d_claim
         where clntsys = :the_clntsys
           and facility = :the_facility
       ) p
       full outer join
       (select claimno
          from d_claim@cms2prod        /* never tried with remote */
         where clntsys = :the_clntsys
           and facility = :the_facility
       ) s
       on p.claimno = s.claimno
 where p.claimno is null
    or s.claimno is null

    Concerning

    Etbin

  • need help for an outer join query

    Hi friends...
    I have oracle 10g...
    I have a question which involve is joining three tables...

    the query is as follows:
    SELECT DISTINCT MU.MKT_ID                  "PAR ID",
                   MU.MKT_ID                  "ROOT ID",
                 MSU.SPEC_ID                "ID",
               SU.SPEC_DESC                "DESC",
           SU.SPEC_CD          "SPEC CD"

              FROM IPOADM_BATCH.MKT_UV1        MU,
                     IPOADM_BATCH.MKT_SPEC_UV1   MSU,
             IPOADM_BATCH.SPEC_UV1       SU

               WHERE MSU.MKT_ID  = MU.MKT_ID
           AND MSU.SPEC_ID = SU.SPEC_ID
         AND SU.SPEC_GRP_OR_CMPSTN_CD = 'C';
    in my front end application has some delete operations that removes specific data of the IPOADM_BATCH. MKT_SPEC_UV1 due to which the above query is nor fetch all rows.
    the relationship between the tables is clearly from the above query...

    I have the data in IPOADM_BATCH. MKT_UV1 and IPOADM_BATCH. Table of SPEC_UV1 after the delete operation

    now, I want the query above to retrieve data from IPOADM_BATCH. MKT_UV1 with small changes to the above query even if there is no data in IPOADM_BATCH. MKT_SPEC_UV1.

    I thought that if I use an outer join I can get it, but here I have to join three tables-join condition is based on the table that doesn't have a data...


    so please help me guys how can I change the query to get my desired out put...

    Hello

    There are several different things you could mean by it.

    Here's how to join the tables to get one of them:

    SELECT DISTINCT  mu.mkt_id                  "PAR ID",
                 mu.mkt_id                  "ROOT ID",
                 msu.spec_id                "ID",
                 su.spec_desc               "DESC",
                 su.spec_cd                   "SPEC CD"
FROM           ipoadm_batch.mkt_uv1        mu
LEFT OUTER JOIN      ipoadm_batch.mkt_spec_uv1   msu  ON   msu.mkt_id               = mu.mkt_id
LEFT OUTER JOIN  ipoadm_batch.spec_uv1       su       ON   msu.spec_id              = su.spec_id
                                              AND  su.spec_grp_or_cmpstn_cd = 'C'
;

    If it does not matter what it is that you want, and then after a small example of data (CREATE TABLE and INSERT, only relevant columns instructions) for all the tables and the results desired from these data.
    Highlight a few places where the above querry is the production of incorrect results of your sample data and explains how to get the correct results in these places.

  • Need help with outer joins

    I have the following table structure,

    _ Table - 1
    ---------------------------------
    ID | Information
    ---------------------------------
    1. abcadskasasa
    2. asdasdasdasd
    3. saeqdfdvsfcsc
    ---------------------------------


    _ Table - 2
    ---------------------------------
    ID | NEST
    ---------------------------------
    1. 12
    1. 13
    2. 14
    1. 15
    1. 16
    2. 12
    ---------------------------------



    _ Table - 3
    ---------------------------------
    ID | THIERRY
    ---------------------------------
    1. 12
    2. 14
    1. 15
    ---------------------------------

    Now, I want to choose for each ID in table 1 and the number of MIP in the table 2-number of THIERRY of table 3.

    Desired output:_

    ---------------------------------------------------------------------------------------------------
    ID | COUNT_PID | COUNT_PARID
    ---------------------------------------------------------------------------------------------------
    1. 4. 2
    2. 2. 1
    3. 0 | 0
    ---------------------------------------------------------------------------------------------------

    Could someone please help me with this. I'm doing using outer joins, but as I work mainly at the edge of the end, not able to reach an appropriate solution to that above.

    Thanks in advance,
    Tejas

    You should not outer join... That should do it...

    select ID , (select count(PID) from table2  t2 where t2.id = t1.id) , (select count(PARID) from table3  t3 where t3.id = t1.id)
from table1

  • Need help with outer join

    Hello

    I have a requirement in which I need to get data from a third table where a date of the third table is higher than a date in the second array.

    Ex:

    SELECT t1.column1, t3.column2
FROM t1, t2, t3
WHERE t1.id = t2.foreign_id
AND t1.id ( + ) = t3.foreign_id
AND t3.some_date_column > t2.another_date_column

    However, using the query above returns no results if the date condition is not met. I still need to show t1.column1 and a null t3.column2.

    How should I do this?

    Thank you

    Allen

    Edit: Added information about the requirement.

    Hi Allen

    1. SELECT t1.column1, t3.column2
    2. T1, t2, t3
    3. WHERE t1.id = t2.foreign_id
    4. AND t1.id = t3.foreign_id (+)
    5. AND t3.some_date_column (+) > t2.another_date_column

    I guess that this t1.column1 must not be null. Or am I wrong? The + sign must be placed on the side where draws are accepted. You must repeat it for each condition on the table.

    Alternativlely you can use the LEFT OUT JOIN syntax. If the two columns are allowed null you need a FULL OUTER JOIN.

    BTW: The join to t2 is not required if a refefernce constraint forced.

  • Help with sql FULL OUTER JOIN

    Hi all
    I need assistance with SQL FULL OUTER JOIN.

    How to write with FULL OUTER JOIN, the query.
    I tried like


    I have 3 different queries.

    Query q: SELECT emp_id LN.emp_id.
    Sum (LN_amount) loan_amt
    MY_LON_TAB LN
    WHERE LN_amount > 20000
    LN.emp_id GROUP;



    Query b: SELECT PLN. EMP_ID emp_id,
    Sum (PLAN_AMOUNT) plan_amt
    FROM PLN MY_PLAN_TAB
    where PLAN_AMOUNT <>0
    GROUP BY PLN. EMP_ID;


    Query C:

    SELECT FLX. EMP_ID emp_id,
    SUM (PRORATE_AMOUNT) PRORATE_AMT
    OF MY_FLX_TAB FLX
    WHERE PRORATE_AMOUNT <>0
    FLX GROUP. EMP_ID;


    Suppose that the different subquery above 3 a, b, c respectively. each subquery with emp_id and respective amount.

    like a.emp_id, a.loan_amt
    b.emp_id, b.plan_amt
    c.emp_id, c.prorate_amt

    I show all the empid with their amount respective.
    schenario: If an account made, but not vice-versa b
    and B have record, but not vice versa c
    and a credit record but not vice versa c

    first: I have external is associated with the A and B
    Second: join external then complete the total outcome of (a & b) with c
    but empid c just as empty.


    My output is:

    emp_id a.loan_amt, b.plan_amt c.prorate_amt
    101 5000 null null
    102 4500 null 2000
    103 6700 null null


    How to solve the foregoing to the ANSI (FULL OUTER JOIN) method.
    Please suggest me.

    Thanks in advance...
    PKM

    Hello

    It is very difficult for anyone to say what you're doing wrong if they do not know what you are doing. Post your code FULL OUTER JOIN.
    My best guess is:

    WITH     a     AS
(
     SELECT     ...      -- What you posted as query a
)
,     b     AS
(
     SELECT     ...      -- What you posted as query b
)
,     c     AS
(
     SELECT     ...      -- What you posted as query c
)
SELECT     COALESCE ( a.emp_id
           , b.emp_id
           , c.emp_id
           )     AS emp_id
,     ...     -- whatever other columns you want
FROM          a
FULL OUTER JOIN     b  ON     b.emp_id =            a.emp_id
FULL OUTER JOIN     c  ON     c.emp_id = COALESCE (a.emp_id, b.emp_id)
;

    I hope that answers your question.
    If not, post a small example (CREATE TABLE and INSERT statements) data for all tables and the results expected from these data (if not what you have already posted).

  • [8i] need help with full outer join combined with a cross join...

    I can't understand how to combine a full outer join with a different type of join... is it possible?

    Here are some create table and insert for examples of database:
    CREATE TABLE     my_tab1
(     record_id     NUMBER     NOT NULL     
,     workstation     VARCHAR2(4)
,     my_value     NUMBER
     CONSTRAINT my_tab1_pk PRIMARY KEY (record_id)
);

INSERT INTO     my_tab1
VALUES(1,'ABCD',10);
INSERT INTO     my_tab1
VALUES(2,'ABCD',15);
INSERT INTO     my_tab1
VALUES(3,'ABCD',5);
INSERT INTO     my_tab1
VALUES(4,'A123',5);
INSERT INTO     my_tab1
VALUES(5,'A123',10);
INSERT INTO     my_tab1
VALUES(6,'A123',20);
INSERT INTO     my_tab1
VALUES(7,'????',5);


CREATE TABLE     my_tab2
(     workstation     VARCHAR2(4)
,     wkstn_name     VARCHAR2(20)
     CONSTRAINT my_tab2_pk PRIMARY KEY (workstation)
);

INSERT INTO     my_tab2
VALUES('ABCD','WKSTN 1');
INSERT INTO     my_tab2
VALUES('A123','WKSTN 2');
INSERT INTO     my_tab2
VALUES('B456','WKSTN 3');

CREATE TABLE     my_tab3
(     my_nbr1     NUMBER
,     my_nbr2     NUMBER
);

INSERT INTO     my_tab3
VALUES(1,2);
INSERT INTO     my_tab3
VALUES(2,3);
INSERT INTO     my_tab3
VALUES(3,4);
    And, the results that I want to get:
    workstation     sum(my_value)     wkstn_name     my_nbr1     my_nbr2
---------------------------------------------------------------
ABCD          30          WKSTN 1          1     2
ABCD          30          WKSTN 1          2     3
ABCD          30          WKSTN 1          3     4
A123          35          WKSTN 2          1     2
A123          35          WKSTN 2          2     3
A123          35          WKSTN 2          3     4
B456          0          WKSTN 3          1     2
B456          0          WKSTN 3          2     3
B456          0          WKSTN 3          3     4
????          5          NULL          1     2
????          5          NULL          2     3
????          5          NULL          3     4
    I tried a number of different things, google my problem and no luck yet...
    SELECT     t1.workstation
,     SUM(t1.my_value)
,     t2.wkstn_name
,     t3.my_nbr1
,     t3.my_nbr2
FROM     my_tab1 t1
,     my_tab2 t2
,     my_tab3 t3
...
    So, what I want, it's a full outer join of t1 and t2 on workstation and a cross join of one with the t3. I wonder if I can't find examples of it online because it is not possible...

    Note: I'm stuck dealing with Oracle 8i

    Thank you!!

    Hello

    The query I posted yesterday is a little more complex that it should be.
    My_tab2.workstation is unique, there is no reason to make a separate subquery as mt1. We can join my_tab1 to my_tab2 and get the SUM in a subquery.

    SELECT       foj.workstation
,       foj.sum_my_value
,       foj.wkstn_name
,       mt3.my_nbr1
,       mt3.my_nbr2
FROM       (     -- Begin in-line view foj for full outer join
          SELECT        mt1.workstation
          ,        SUM (mt1.my_value)     AS sum_my_value
          ,        mt2.wkstn_name
          FROM        my_tab1   mt1
          ,        my_tab2   mt2
          WHERE        mt1.workstation     = mt2.workstation (+)
          GROUP BY   mt1.workstation
          ,        mt2.wkstn_name
                        --
                UNION ALL
                        --
          SELECT      workstation
          ,      0      AS sum_my_value
          ,      wkstn_name
          FROM      my_tab2
          WHERE      workstation     NOT IN (     -- Begin NOT IN sub-query
                                           SELECT      workstation
                                   FROM      my_tab1
                                   WHERE      workstation     IS NOT NULL
                                 )     -- End NOT IN sub-query
       ) foj     -- End in-line view foj for full outer join
,       my_tab3  mt3
ORDER BY  foj.wkstn_name
,       foj.workstation
,       mt3.my_nbr1
,       mt3.my_nbr2
;

    Thanks for posting the CREATE TABLE and INSERT statements, and very clear expected results!

    user11033437 wrote:
    ... So, what I want, it's a full outer join of t1 and t2 on workstation and a cross join of one with the t3.

    She, exactly!
    The trickiest part is when and how get SUM (my_value). You could address the question of exactly what my_tab3 must be attached to a cross that's exactly what should look like the result set of the full outer join between my_tab1 and my_tab2 to. To do this, take your desired results, remove columns that do not come from the outer join complete and delete duplicate rows. You will get:

    workstation     sum(my_value)     wkstn_name
-----------     -------------   ----------
ABCD          30          WKSTN 1
A123          35          WKSTN 2
B456          0          WKSTN 3
????          5          NULL

    So the heart of the problem is how to get these results of my_tab1 and my_tab2, which is done in the subquery FOJ above.

    I tried to use auto-documenté in my code names. I hope you can understand.
    I could spend hours explaining the different parts of this query more in detail, but I don't know that I would lose some of that time, explain things that you already understand. If you want an explanation of the specific element (s), let me know.

  • Doubt with OUTER JOIN behavior

    I thought I knew all about OUTER JOINS to this scenario. Can pls someone explain how Oracle behaves in the following SQL code:

    WITH t1 AS
(SELECT 1 as empid from dual
union all
select 2 from dual),
t2 as
(select 1 as empid from dual)
select *
from t1 
left outer join
t2
on (
t1.empid = t2.empid AND t1.empid=2
);

    Expected O/P

    EMPID EMPID_1
    2NULL VALUE

    Real O/P

    EMPID EMPID_1
    1NULL VALUE
    2NULL VALUE

    In this way...

    SQL > ed
    A written file afiedt.buf

    1 t1 WITH (SELECT empid from all double union 1
    2. Select 2 double),
    3 t2 (select 1 as double empid)
    4  --
    5 Select
    6 T1
    7 * a left outer join t2 (t1.empid = t2.empid) and t1.empid = 2
    SQL > /.

    EMPID EMPID
    ---------- ----------
    2
    1

    the "t1.empid = 2' is part of the OUTER JOIN condition.

    In this way...

    SQL > ed
    A written file afiedt.buf

    1 t1 WITH (SELECT empid from all double union 1
    2. Select 2 double),
    3 t2 (select 1 as double empid)
    4  --
    5 Select
    6 T1
    left outer join 7 t2 on (t1.empid = t2.empid)
    8 * where t1.empid = 2
    SQL > /.

    EMPID EMPID
    ---------- ----------
    2

    the "t1.empid = 2" belongs to the filtering conditions

    When it is part of the OUTER JOIN condition, he says that he should join t2 records where all conditions are met, otherwise the join should not be made, it does not say it to filter the overall results.

    Maybe this helps clarify...

    SQL > ed
    A written file afiedt.buf

    1 t1 WITH (SELECT empid from all double union 1
    2. Select 2 double),
    3 t2 (select empid Union 1 double all the)
    4. Select 2 of the double)
    5  --
    6 select *.
    7 T1
    8 * a left outer join t2 (t1.empid = t2.empid) and t1.empid = 2
    SQL > /.

    EMPID EMPID
    ---------- ----------
    2          2
    1

    Here we have 1 and 2 records in both tables, but the records in t2 are joined only where the record of t1 has an empid 2, so, although t2 has an empid 1, which is not reached because the join condition is not met.

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