Self Joins Getting Rid Of Duplicates?

Jun 17, 2008

I have a table1:
userid, name, town.

Now i want to do a self join like:

select a.name, b.name, a.town
from table1 a
inner join table1 b
on a.town = b.town
where a.first_name <> b.first_name AND
a.last_name <> b.last_name

i added the where clause to limit duplicates i would get but i still get duplicates eg. A B london, B A london etc.

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Way To Eliminate Duplicates

Jun 11, 2013

I have a table like below:

tableA
aid des
1 concrete
2 wood
3 straw
4 plastic
5 fiber glass
6 other

tableB
bid material
01 1
02 2
03 3
01 2
01 2
02 3
01 5

The result I need when updating another table with this info is:TableC
edw_id bid Requirement
021 1 concrete, wood, fiber glass
032
025
123
521

I do not want :
concrete, concrete, concrete, wood, wood, fiber glass

SO far I am using the following but since I am dealing with hundreds of column that has the same material, when using listagg() from oracle 11.2g, they column width is too wide to fit into the required column.

update eris_data_work e set E.flex37 =
(select
LISTAGG(CM.des, ',') WITHIN GROUP (ORDER BY CM.des) AS casing_material
from CODE_CASING_MATERIAL CM, TBLCASING CA
where CM.code=CA.MATERIAL and CA.well_id=E.owner_oid AND CM.DES IS NOT NULL
GROUP BY CA.well_id)
where E.source='WWIS_ON'

I have even used the regexp_count() to try to eliminate duplicates however I have had no success so far

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Using Subqueries In JOINS

Sep 30, 2011

In mys store procedure I am using a subquery with INNER JOIN. This subquery calls a user defined function which takes main query fields as parameter values. But i am facing issue for accessing main query fields. my query is like below:

SELECT
ID, Name, sub.Desc, sub.Date
FROM MainTable main
INNER JOIN
(
SELECT * FROM RMF_GetData(main.ID)
) sub
ON main.ContactID = sub.ContactID

I need data from a function in a table format based on some case conditions. Hence i need to join it with main table. But here oracle gives error as "invalid identifier" for main.ID parameter.

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Query To Use Joins

Mar 11, 2009

SELECT so.* FROM shipping_order so WHERE (so.submitter = 20)
OR (so.requestor_id IN (SELECT poc.objid FROM point_of_contact poc WHERE poc.ain = 20))
OR so.objid IN (SELECT ats.shipping_order_id FROM ac_to_so ats WHERE (ats.access_control_id IN (selectac. objid FROM access_control ac WHERE ac.ain = 20
OR ac.group IN ('buyers', 'managers'))))

rewrite this query to use joins. That would greatly simplify my sql query building code. The ids, objids, submitter, ain are numeric and group is a varchar.

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SQL & PL/SQL :: Best Way To Find Duplicates?

Feb 14, 2012

I have to load 50 Million records in a table. I also need to ensure that no duplicate records enter. Business demand is that It may send 2 Million records today, 1 Million records tomorrow, 3 million records on the next day and so on...

I have loaded 6 Million records into the table, but onwards speed of loading records (with duplicate check) is decreasing.

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SQL & PL/SQL :: Joins With COUNT

Nov 16, 2011

I pulled in 1121 SSN's into a table and am using that table as the basis for returning data from other tables...including how many documents a user has in their folder.

My query; however, is only returning 655 rows...it is returning only those rows that have documents in their folders. I want to return ALL rows...WHETHER OR NOT THEY HAVE A DOCUMENT COUNT (count(*)). How can I get all 1,121 rows to return? I would like the output to look like:

SSN LOCATION EMP_STATUS FOL_STATUS COUNT(*)
-- For those folders containing documents:
XXX-XX-XXXX WHATEVER WHATEVER WHATEVER 12

-- For those folders containing 0 documents:
XXX-XX-XXXX WHATEVER WHATEVER WHATEVER NULL

Here is the query in it's current state:

-- Get User/Folder/Doc Count Information
SELECT b.ssn,
b.location,
b.emp_status,
c.fol_status,
COUNT (*)

[Code]....

So again, my problem here is that...not all FOLDERS contain DOCUMENTS...but I still want the folder data lised...I just need it listed with either a zero count (0), or a NULL in the COUNT(*) column.

I'm trying the various joins, but none of them seem to be working.

I've tried the old 8i (+) join as follows:

AND c.fol_id = d.doc_fol_id(+)

I've tried the inner join:

AND c.fol_id(+) = d.doc_fol_id

...and I've tried the 9i method (left outer and full outer) using the following types of notations:

folder c full outer join documend d on c.fol_id = d.doc_fol_id

...so far, no luck. I'm still having only 655 rows returned (the 655 are those folders that HAVE document count > 0. Any folder that has zero documents in the document table just aren't being returned in the query.)

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SQL & PL/SQL :: Pick One Out Of Duplicates?

Jul 19, 2010

I have need, where I need to pick-up the one of the records out of 2, which have all the fields same but one key column? how should I do it?

sample data:

IDnamecreation dateupdate date
121233ATR7/19/2010 15:307/19/2010 15:30
1213344MTR7/19/2010 15:307/19/2010 15:30

For most of the cases, i am picking latest data using update date, but here where dates are same, I am stuck.

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PL/SQL :: Removing Duplicates Except One

Sep 19, 2013

db and dev 10g rel2 ,suppose that i have a table with a lot of duplicate rows ,what i need is to delete the duplicates and retain one row of these duplicates . likecolumn -- with those values...how to delete two (hi's) and retain the third , ?it is all applied to all the duplicate values in the column.

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Can't Get Joins On Tables Properly

May 2, 2008

why how ever way i try i cant get the joins on the tables properly.... well i know i have to work hard....if join is not proper the data i extract is also not proper.Well now i have 3 tables...

ps_operations

Name Null? Type
----------------------------------------- -------- --------
ASSB_PT_NBR_SEQ_ID NOT NULL NUMBER(8)
OPERATION_NBR NOT NULL VARCHAR2(10)
EFFECTIVE_FROM_DT NOT NULL DATE
DML_TS NOT NULL DATE
DML_USER_ID NOT NULL VARCHAR2(30)
OPERATION_DESC NOT NULL VARCHAR2(70)
HOURS_PER_PIECE_QTY NOT NULL NUMBER(9,6)
PIECES_PER_HOUR_RATE_QTY NOT NULL NUMBER(15,7)
EFFECTIVE_TO_DT DATE
EXTRACT_IND VARCHAR2(1)
[code]...

I have never worked on CPK and UK....so i dont know how to use them to join the tables,.

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Remote DB Query With Joins?

Feb 23, 2012

We have access to a remote Oracle database in Germany and need to insert selected data to our local Oracle database. Our problem is that we have to do several joins (7 tables) on the remote database as well as using one where clause (always the same: P.T_LIEF_LFNT_1='12803193').

Unfortunately we do not have rights to create a view on the remote database. Is there another way to send the entire query to the remote database for processing? Also, the query returns approximately 34,000 rows.

Here is our current query:

INSERT INTO PRIMUS(PARTNO,
SORT_FORMAT,
TP_WORKSPACE,

[Code].....

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SQL Tuning - String Of One-to-one Joins

Oct 1, 2013

I have a query I am trying to tune. It presently takes anywhere from 15 minutes to two hours to run, depending on how many records the client has. But it needs to run several hundred times, and finish over the course of a weekend. When it runs over, we have problems.

Here's the basic structure of the query:

CODESELECT ...
  FROM main_tab,
       tab_a,
       tab_b,
       tab_c,
       ...
       tab_z
WHERE main_tab.client_id = :1
   AND main_tab.unique_id = tab_a.unique_id(+)
   AND main_tab.unique_id = tab_b.unique_id(+)
   AND main_tab.unique_id = tab_c.unique_id(+)
   ...
   AND main_tab.unique_id = tab_z.unique_id(+);

All of the tables are indexed (and statistics are gathered) on the field unique_idMain_tab has an index on client_id.There is a one-to-one join (sometimes one-to-zero, thus the outer join) from the main_tab table to all the other tables.These are static tables, they're wiped and recreated - no changes, inserts, deletes.

By default, the optimizer does a full table scan and then a hash join on every single of the 26 tab_a through tab_z tables, only using the index on main_tab.

By the way I can add indexes, possibly even to the point of adding an index on some tables that would include all the fields found in the select clause on that table. But I cannot change the table structure (by, say, combining these tables together).

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SQL & PL/SQL :: Using NVL2 To Control Joins

Jan 5, 2012

I am trying to control which tables are joined based on a null value, so I figured I could use the NVL2.

Here is the code as it stands

NVL2(TBL_TRANSACTIONS.EQUIPSVCSEQ, TBL_EQUIPANDSERVICES.LASTWORKORDERSEQ, TBL_TRANSACTIONS.WORKORDERSEQ)
= TBL_WORKORDERS.WORKORDERSEQ (+)

To explain, if first value is null, then TBL_EQUIPANDSERVICES.LastWOSeq = tbl_workorders.workorderseq (+), otherwise join the transaction.workorderseq.

When I try and execute this code, I'm given "ORA-01417: a table may be outer joined to at most one other table." I've double checked, TBL_Workorders is not joined with any other table in any select.

Now, the EquipandServices.workorderseq is joined (+) with another table.

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SQL & PL/SQL :: How To Remove Duplicates From Collection

Mar 24, 2011

remove duplicates from my collection(table type).Or an alternate solution for my issue is get clean data into my collection which i am not able to get to either.

Object creation

create table testingtype_table(ordernumber number,org_id number , company_name varchar2(10))
insert into testingtype_table values (1124,2424,'cbaaa');
insert into testingtype_table values (1124,2424,'cbaaa');

create or replace type testingtype_obj as object (ordernumber number,org_id number , company_name varchar2(10));
create or replace type testingtype_tab as table of testingtype_obj;

Code Block
declare
l_testingtype_tab testingtype_tab := testingtype_tab();
begin
select distinct testingtype_obj(ordernumber
,org_id
,company_name)
bulk collect into l_testingtype_tab
from testingtype_table;
end;

If only i can get a way to bulk collect only distinct values into the table type that will just do great but when i try the above (with distinct highlighted in red) it throws an error

ORA-22950: cannot ORDER objects without MAP or ORDER method

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SQL & PL/SQL :: Remove String Duplicates

Oct 11, 2013

Removing duplicates from a string that contains years and "-".

Example: 1988-1997-2000-2013-1998-1965-1997-1899

I know this can be done in regular expressions but have no experience in this subject.

select REGEXP_REPLACE(.....) from dual;

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SQL & PL/SQL :: Remove Repeating Duplicates

Aug 3, 2011

i have two tables

Quote:
Table has following data.

id indicator
---------------
1 A
2 A
3 A

Quote:
Table2 has

id indicator
---------------
1 X
1 X
2 X
3 X

I would like to have following output ( Am running query on Toad)

t1_id t1_indicator t2_id t2_indicator
---------------------------------------------
1 A 1 X
1 X
2 A 2 X
3 A 3 X

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SQL & PL/SQL :: Get A Specific Record In Duplicates

Aug 17, 2012

I have a requirement with source table has duplicates so i need to select a row based upon the below condition.

Source table

EMP_NO ENAME SALARY CODE EMP_ID
1 TOM 1000 1 10
1 JOHN 2000 A 20
1 SAM 3000 A 30

2 TOM 500 1 40
2 SUNG 1500 1 50

Desired Output

EMP_NO ENAME SALARY CODE EMP_ID
1 TOM 1000 1 10
2 SUNG 1500 1 50

I tried with MAX and DENSE_RANK but its not getting me the first row.

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SQL & PL/SQL :: Table Partition Using Joins

Mar 21, 2011

can i able to partition the table based on the column which is in another table ??

For example Table X need to be partitioned based on the column in The Table Y . and Table X and table Y has some relation.

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SQL & PL/SQL :: Group Functions In Joins

Jul 29, 2013

i want to get SUM(salary) by combining both employee and employees table.Look my table structure below:

SQL> select * from employee;

EMPNO ENAME HIREDATE ORIG_SALARY SALARY R MGR DEPTNO
---------- --------------- --------- ----------- ---------- - ---------- ----------
1 Jason 25-JUL-96 1234 8767 E 2 10
2 John 15-JUL-97 2341 3456 W 3 20
3 Joe 25-JAN-86 4321 5654 E 3 10
4 Tom 13-SEP-06 2413 6787 W 4 20
5 Jane 17-APR-05 7654 4345 E 4 10
6 James 18-JUL-04 5679 6546 W 5 20
7 Jodd 20-JUL-03 5438 7658 E 6 10
8 Joke 01-JAN-02 8765 4543 W 20
9 Jack 29-AUG-01 7896 1232 E 10
[code]....

Above, i used separate queries to get the result of SUM(salary) by deptno.Here, I want a single query to get SUM(salary) with deptno.

deptno Sum(salary)
----------------------------
10 30056
20 27132
30 6300
40 4300

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SQL & PL/SQL :: Selecting First Row From Multiple Joins?

Apr 2, 2010

I'm putting together a path to select a revision of a particular novel:

SELECT e.documentname, e.Revision, e.VersionNumber
FROM Catalog, BookInCatalog
INNER JOIN NovelMaster
INNER JOIN HasNovelRevision
INNER JOIN NovelRevision e
LEFT JOIN NovelRevision s

[code]...

My goal here is to select the earliest revision from the set of Novel revision. The revision field is a string.

When I run the query for Novels that have multiple revisions I get multiple records. If there is just one record I only get one row. If there are two I get four (two for each revision). As the number of revision increases it looks like it just mushrooms from there.

One other challenge is the format of the revision- a revision sequence could look like this:

A
B
C1
C2
C
D
E1
E

So there are "intermediate" revision referred to by a number. In this case I would select revision A, but if I had:

A1
A
B1
B

I would want to select B. I am pretty sure that all the revision are stored in the db in order.Notice that the comparison operator ">" is used in e.Revision > s.Revision. I initially though it should have been "<" because we want to select the initial but the other way gives me the right order (though the wrong results).

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PL/SQL :: Inner Join Resulting In Many To Many Duplicates

Oct 9, 2013

I ran an Inner Join but it returned many, many duplicates. One Answer from a different thread:Because you may be having improper Join condition what has a One to many or a Many to many relationship between the tables. We do not have the data, and hence cannot comment over it. What do I look for to identify an improper join?

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Inline Query And Joins

Jul 31, 2012

When to use inline query and to use join.

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PL/SQL :: Get A Specific Record In Duplicates?

Aug 17, 2012

I have a requirement with source table has duplicates so i need to select a row based upon the a condition.

Source table

EMP_NO ENAME SALARY CODE EMP_ID

1 TOM 1000 1 10
1 JOHN 2000 A 20
1 SAM 3000 A 30
2 TOM 500 1 40
2 SUNG 1500 1 50

Desired Output

EMP_NO ENAME SALARY CODE EMP_ID
1 TOM 1000 1 10
2 SUNG 1500 1 50

I tried with MAX and DENSE_RANK but its not getting me the first row.

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SQL & PL/SQL :: Primary Key / Foreign Key Joins

Sep 29, 2010

I am working on a new project in OBIEE. I am asked to do the data modeling in the database using oracle sql developer. I have to create the joins based on the requirements. I have the tables created already. But the primary keys for few tables are not defined for few tables. PK-FK joins are also not done properly.

My questions are
(1) If I have to define the primary key for the existing tables can I do that using the alter table command or should I create the table all over again and then define it?
(2) If I have to make the changes in the existing PK-FK joins how do i go about doing that?

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SQL & PL/SQL :: Purpose Of Using Joins Over Where Clause

Feb 29, 2012

If a query can be written using where clause, what is the purpose of using joins over where clause?

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PL/SQL :: Remove Duplicates From A Column

Nov 8, 2012

I want to remove duplicates from a column MAIN_TABLE based on TLEVEL Column:

create table UNIQ_TEMP
( TLEVEL NUMBER(10,0),
TABLE_NAME VARCHAR2(30),
MAIN_TABLE VARCHAR2(30)
);
[code]....

My Requirement is:

MAIN_TABLE= MARKETING_OPTIN
EXISTS IN MAX(TLEVEL)
REMOVE DUPLICATE MARKETING_OPTIN FROM OTHER LEVELS

This should apply to all the values in column MAIN_TABLE

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SQL & PL/SQL :: NULL In Left Joins

Jun 11, 2013

I am observing some skewed results for Left outer join where the main table has NULL in the field we are joining against with another table.

Just wondering if there are some tricks to get over it. I am currently using NVL(tab1.col1,'X') = NVL(tab2.col3,'X') and am just wondering if there is a better way to handle this.

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PL/SQL :: Query Using Subquery And Joins

Feb 7, 2013

I want to display first joined and last joined employee name(first_name) in each department like this

department_name | first joined employee | last joined employee

I think we have to use joins and sub query.

employee table attributes -
EMPLOYEE_ID
FIRST_NAME
LAST_NAME
EMAIL
PHONE_NUMBER
HIRE_DATE
JOB_ID

[Code]....

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Flexible Handling Of Duplicates Using A Trigger

Feb 12, 2007

I'd like to achieve the following (and YES, I do know that this is not multi-user safe, but that's not the point here):

Before inserting a record, the trigger shall check if there's already a duplicate one. Duplicate means in this case when there is an intersection of the time frame, defined by two numeric timestamps. That's also the cause why I cannot use a simple UNIQUE constraint here (in my opinion).

Okay, that already works (see code below). But now I need colliding records to be written to a temporary table so that those records can be returned and presented to the user for selection.

create or replace
TRIGGER TRIGGER1
BEFORE INSERT ON FLIGHT_TABLE
FOR EACH ROW
BEGIN
FOR fs_entry IN (SELECT * FROM FLIGHT_TABLE)
LOOP

[Code] .........

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SQL & PL/SQL :: How To Make Return All Records Except Duplicates

Mar 29, 2010

I have a table like this basic example:

ID Product Color Time-In
1 Apple Green May
2 Apple Red April
3 Pear Green May
4 Pear Green April
5 Plum Blue June

In SQL I want to return all 4 fields of the records except those records where Product and Color are identical - in that case it should return the latest (by name of month - preferred) or just the first it finds

So I should get these

1 Apple Green May
2 Apple Red April
3 Pear Green May
5 Plum Blue June

If I do a select distinct then I will only get those fields I test on (product and color), not the rest.

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SQL & PL/SQL :: Convert Oracle Joins To Ansi?

Apr 11, 2011

the below merge statements has outer join.

merge into merge_st t
using (select * from merge_st1) src
on (t.id=src.id(+))
when matched then update set name=src.name;

I need to convert oracle joins to ANSI joins. I have tried below

update (select t1.name as t1_name,t2.name as t2_name
from merge_st t1 lef outer join merge_st t2
on(t1.id=t2.id))
set t1_name=t2_name;

It statements shows error like cannot modify the non key preserved tables.I have cheked these table has contains whether primary key or not.there is no constraints for these tables.Our application, constaints handle in front end. so we cannot create any constraints in oracel database.how to convert oracle joins to ansi join?

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