Remove duplicates based on a condition

Hi all

I need help on a query to remove the duplicates based on a condition.

For example, my table is

FE CC DATE FLAG
----------------------------------------
FE1 CC1 10/10 FB
FE1 CC1 FB 9/10
FE1 CC1 11/10 AB
FE1 CC2 9/10 AB
FE1 CC2 10/10 FB
FE1 CC2 11/10 AB

I want to delete all duplicate rows FE and CC, based on the sub condition:
DATE < MAX (DATE) WHERE FLAG = "FB".

This means I want to remove the FB 9/10 FE1 CC1 line
but not lines
FE1 CC1 10/10 FB
and
FE1 CC1 11/10 AB
as only the FE1 CC1 line 9/10 FB has date < MAX (DATE) WHERE FLAG = "FB".
Similarly, I want to keep
FE1 CC2 10/10 FB
FE1 CC2 11/10 AB
but not
FE1 CC2 9/10 AB

Thank you very much.

Can be like that...

delete from  t
where dt < ( select max(dt) from  where fe=t.fe and cc=t.cc and flag='FB' )

Tags: Database

Similar Questions

Remove duplicates

Hello
A conversation recently asked me the below question "if I have a table with a value of 10 billion records, which is partitioned and one of the partition has 1 billion documents, of which 10 million are duplicates. What is the fastest way to remove duplicates, based on a natural key that is Btree indexed"?
My first obvious answer (and the only one that I practically used tables up to a value of 1 million lines) was chunkwise delete using rowid or grade that is to say write a PL/SQL block and remove approximately 200,000 records in each iteration and commit after 200,000 records so that redo log and undo the memory space of the journal are not jumping. The interviewer asked a better/more quick. Frankly, I couldn't think of any other method.
PL/SQL has a bulk delete method? What's better than a regular or chunk-wise-commit-after-200K-deletes removal? Another way I could think of (I need to try this out however) is to create a SEPARATE table (partion xyz) AS select non partitioned table and then swap partition.
Someone of you have faced a similar situation and approach over time take? I will try the three method above, I could think of a few million lines (I can't put more than 5 million on my DB try otherwise, the DBA will raise a red flag. As a result, cannot test more than 5 million lines in the Dev env) but it cannot show the real difference compared to working with billions :-). Therefore ask any real project experience
Thank you
Sunny

Say the person with whom you had the conversation (interview?)?

Maybe the person plans to create the new table, insert select non-doublons of existing partition into the new table, and then use exchange partition...

Delete a duplicate based on conditions

Hello
< div style = "border: 1pt solid windowtext;" Padding: 1pt 4pt ">"
{size: 9pt} SQL & gt; Select * from
version of v$. {size}

{size: 9pt} BANNER
----------------------------------------------------------------{size}

{size: 9pt} Oracle Database 10g Express
Edition Release 10.2.0.1.0 - product {size}

{size: 9pt} PL/SQL Release 10.2.0.1.0-
Production {size}

{size: 9pt} CORE 10.2.0.1.0 Production {size}

{size: 9pt} AMT for 32-bit Windows:
Version 10.2.0.1.0 - Production {size}

{size: 9pt} NLSRTL Version 10.2.0.1.0 & ndash;
Production {size}

< / div >

You need to remove the lines that is duplicated in the Oracle table.

Source
-----
EMPID NAME CYI
-----
1001. A MACH1
1001. A MACH2
1002 B MAH1
C 1002 MAH1
1002. A MAH1
1003 X MACH12
1003 X MACH1

Output:

-----
I want to just delete a duplicate based on CYI = "MAH1.

EMPID NAME CYI
-----
1001. A MACH1
1001. A MACH2
1002 B MAH1
1003 X MACH12
1003 X MACH1

I tried with this request, but she considers in fact all duplicaes table...

DELETE FROM test00 WHERE rowid NOT IN (SELECT max (rowid) OF test00 WHERE POINT = point 'A' AND GROUP BY)

Thanks in advance

Ananda.

Something like this->

SCOTT>
SCOTT>select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
CORE    10.2.0.3.0      Production
TNS for 32-bit Windows: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production

Elapsed: 00:00:00.04
SCOTT>
SCOTT>
SCOTT>create table ananda
  2  as
  3    (
  4       select 1001 EMPID, 'A' N_AME, 'MACH1' CITY from dual
  5       union all
  6       select 1001, 'A', 'MACH2' from dual
  7       union all
  8       select 1002, 'B', 'MAH1' from dual
  9       union all
 10       select 1002, 'C', 'MAH1' from dual
 11       union all
 12       select 1002, 'A', 'MAH1' from dual
 13       union all
 14       select 1003, 'X', 'MACH12' from dual
 15       union all
 16       select 1003, 'X', 'MACH1' from dual
 17    );

Table created.

Elapsed: 00:00:00.18
SCOTT>
SCOTT>
SCOTT>select * from ananda;

     EMPID N CITY
---------- - ------
      1001 A MACH1
      1001 A MACH2
      1002 B MAH1
      1002 C MAH1
      1002 A MAH1
      1003 X MACH12
      1003 X MACH1

7 rows selected.

Elapsed: 00:00:00.09
SCOTT>
SCOTT>
SCOTT>delete from ananda
  2  where city = 'MAH1'
  3  and   rowid NOT IN (
  4                        select rr
  5                        from (
  6                                select rowid rr,
  7                                      empid,
  8                                      n_ame,
  9                                      city,
 10                                      row_number() over(partition by city order by empid) rn
 11                                from ananda
 12                                where city = 'MAH1'
 13                            )
 14                        where rn =1
 15                  );

2 rows deleted.

Elapsed: 00:00:00.10
SCOTT>
SCOTT>select * from ananda;

     EMPID N CITY
---------- - ------
      1001 A MACH1
      1001 A MACH2
      1002 B MAH1
      1003 X MACH12
      1003 X MACH1

Elapsed: 00:00:00.09
SCOTT>

Kind regards.

LOULOU.

Photo library - iCloud how to remove duplicates

All, someone knows something about OSX/IOS 'Photos' app will detect and remove duplicates photo9? My library 'Photos' 63 299 photos & videos of 2135 from may 2016 and at least 10,000 + of these photos are duplicates (based on an analysis of Photosweeper). I have checked the results of the analysis of Photosweeper by doing a manual visual comparison and check images original in iphoto library (using the function location of show) and confirmed that these 10 000 + photos are images duplicate identical with names of different files in different parts of the photo library database.

So what is happening and how to stop 10-15% of my picture library being duplicate files! I will raise this directly with the apple support payment for the 1 TB icloud service to cover my very large library 'Photos', which should probably be just a large Photo library!

A few other comments for those who have a double problem:

-L' old iPhoto application used to "detect duplicates" when import but the new application 'Photos' does not. Anyone know about this?

-J' saw the documentation from apple saying the icloud search duplicates in 'Photos' when in the icloud, but clearly not work or it does not work if duplicates exist also in the version of the imac to the library 'Photos '.

-Beware of apps that claim to find 'photos' duplicate and are recommended on various Internet sites, a number of them don't work with the old iphotos app the new application 'Photos' (I discovered after you pay and download). If you need a remover of duplicates of photos that work with 'Photos' review and stay away from any application that do not specify clearly and explicitly he works with "photos" and has been seen since the release of the Photos app.

+ I paid $10 for "Gemini" dual Finder and has been a complete waste of time that didn't work only not with the "Photos" application (it wasn't not clear documentation or support, and when I trigger it supported by Macpaw that they said gemini does not support photos and told me to buy another app macpaw - I told them to go jump in a Lake).

+ I found very good Photosweeper that you can set to match exact or variable (for example photos of accidental burst which are 99.99% identical but 0,1s collapse) and then you can right click to view original file / image in the library to manually check duplicate (if you are paranoid like me) - there are many other paid apps that also make this store then around

Photos detects duplicates when you import pictures and when you synchronize with ICPL

Photos does not analyse the duplicates, but checks for them during import and download of IPCL

There are a few duplicate programs that are tested as safe with Photos, including PowerPhotos, PhotoSweeper for the pictures and Duplicate Annihilator for Photos - do not use a tested and documented as safe\

And I'm not clear what your post is about since you are asking how to find duplicates and then provide a good answer - photoSweeper - it is one of the safe and effective ways to remove duplicates for Photos

LN

Remove duplicates from the oracle table using 2 columns

Hello
I need to remove the duplicates of an oracle table based on 2 columns in the table.i tried to remove duplicates using the join, but get the error like sql error ora-00933
Thank you

Hello

Here's one way:

DELETE FROM table_x

WHERE ROWID NOT IN)

SELECT MIN (ROWID)

FROM table_x

Col_1, col_2

);

I hope that answers your question.

If this isn't the case, please post a small example data (CREATE TABLE and only relevant columns, INSERT statements), and the results you want from this data.

In the case of a DML operation (for example, REMOVE) the sample data should show what look like the paintings before the DML, and results will be the content of the or the tables changed after the DML.

Explain, using specific examples, how you get these results from these data.

Always say what version of Oracle you are using (for example, 11.2.0.2.0).

See the FAQ forum: Re: 2. How can I ask a question on the forums?

Remove duplicates in a column
I want to delete duplicates in a column main_table based on the column of TLEVEL:

create the table UNIQ_TEMP
(TLEVEL, NUMBER (10.0),)
TABLE-NAME VARCHAR2 (30),
MAIN_TABLE VARCHAR2 (30)
);

INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (0, 'ASSIGNMENT', "ATTRIBUTION");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (1, 'ASSIGNMENT', 'LOAD');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (1, 'ALLOWANCE', 'FINANCIAL_TRANSACTION_DTL');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (1, 'ALLOCATION', 'PAYMENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOWANCE', 'MISC_CHARGE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ASSIGNMENT', 'LOAD');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOCATION', 'MEMBERSHIP');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOCATION', 'MEMBERSHIP');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOCATION', 'MEMBERSHIP');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, "ATTRIBUTION" AND "INVOICE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOWANCE', 'FINANCIAL_TRANSACTION_HDR');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOCATION', 'DISCOUNT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOWANCE', 'CHARGE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOWANCE', 'CHARGE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOWANCE', 'CHARGE_DETAIL_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOWANCE', 'SUBSCRIPTION_PERIOD');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOCATION', 'PAYMENT_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (2, 'ALLOWANCE', 'PAYMENT_CHANNEL');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOCATION', 'PAYMENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOCATION', 'DISCOUNT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'MISC_CHARGE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'INVOICE_PERIOD');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'INVOICE_STATUS');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'INVOICE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOCATION', 'MEMBERSHIP');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'CANCELLED_REASON');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ASSIGNMENT', 'LOAD');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'CHARGE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'CHARGE_DETAIL');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'CHARGE_DETAIL');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'SUBSCRIPTION_PERIOD_STATUS');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'SUBSCRIPTION_PERIOD_STATUS');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'SUBSCRIPTION_PERIOD_STATUS');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ASSIGNMENT', 'LOAD');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ASSIGNMENT', 'SUBSCRIPTION');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'PRODUCT_ITEM');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'PRODUCT_ITEM');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'PRODUCT_ITEM');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ASSIGNMENT', 'BALANCING');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (3, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'MISC_CHARGE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'MISC_CHARGE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'PAYMENT_CHANNEL');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', 'PAYMENT_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "PRODUCT_CODE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "PRODUCT_CODE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "PRODUCT_CODE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'PRODUCT_MASTER');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'PRODUCT_MASTER');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'PRODUCT_MASTER');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "PRODUCT_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'VEHICLE_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'VEHICLE_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'VEHICLE_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'CHARGE_DETAIL_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'CHARGE_DETAIL_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'CHARGE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'CHARGE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', 'DISCOUNT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', 'DISCOUNT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'INVOICE_STATUS_FILTER');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', 'MEMBERSHIP');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', 'MEMBERSHIP');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', 'MEMBERSHIP');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', 'MEMBERSHIP');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', 'MEMBERSHIP');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'ADJUSTMENT_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (4, 'ALLOWANCE', 'CANCELLED_REASON_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOCATION', "PRODUCT_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOCATION', "PRODUCT_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOCATION', "PRODUCT_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ASSIGNMENT', 'CLIENT');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOCATION', "ALLOCATION_TYPE");
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (5, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (6, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (6, 'ASSIGNMENT', 'CAMPAIGN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (6, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (6, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (6, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (6, 'ALLOWANCE', 'BILLING_CYCLE_TYPE');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (6, 'ALLOWANCE', 'MARKETING_OPTIN');
INSERT INTO UNIQ_TEMP (TLEVEL, TABLE_NAME, MAIN_TABLE) VALUES (6, 'ALLOWANCE', 'MEMBERSHIP_CARD_TYPE');

COMMIT;

TLEVEL TABLE_NAME MAIN_TABLE
ALLOCATION OF THE ALLOWANCE 0
1 DISTRIBUTION CHARGE
1 ALLOCATION FINANCIAL_TRANSACTION_DTL
1 ALLOWANCE PAYMENT
2 ALLOWANCE MISC_CHARGE
2 LOAD DISTRIBUTION
2 ALLOWANCE ALLOCATION_TYPE
2 ALLOWANCE ALLOCATION_TYPE
ALLOCATION OF 2 MEMBERS
ALLOCATION OF 2 MEMBERS
ALLOCATION OF 2 MEMBERS
2 ALLOWANCE BILL
2 ALLOWANCE FINANCIAL_TRANSACTION_HDR
2 ALLOWANCE DISCOUNT
2 DISTRIBUTION CLIENT
2 DISTRIBUTION CLIENT
2 ALLOWANCE CHARGE_TYPE
2 ALLOWANCE CHARGE_TYPE
2 ALLOWANCE CHARGE_DETAIL_TYPE
2 ALLOWANCE SUBSCRIPTION_PERIOD
2 ALLOWANCE PAYMENT_TYPE
2 ALLOWANCE PAYMENT_CHANNEL
3 DISTRIBUTION CLIENT
PAYMENT OF THE ALLOWANCE 3
3 DISTRIBUTION CLIENT
3 ALLOWANCE ALLOCATION_TYPE
3 ALLOWANCE ALLOCATION_TYPE
3 ALLOWANCE DISCOUNT
3 MISC_CHARGE ALLOWANCE
3 BILLING_CYCLE_TYPE ALLOWANCE
3 BILLING_CYCLE_TYPE ALLOWANCE
3 INVOICE_PERIOD ALLOWANCE
3 INVOICE_STATUS ALLOWANCE
3 INVOICE_TYPE ALLOWANCE
3 MARKETING_OPTIN ALLOWANCE
3 MARKETING_OPTIN ALLOWANCE
3 ALLOWANCE CAMPAIGN
3 ALLOCATION MEMBERSHIP
3 ALLOWANCE CAMPAIGN
3 CANCELLED_REASON ALLOWANCE
3 ALLOWANCE ALLOCATION_TYPE
3 LOAD DISTRIBUTION
3 CHARGE_TYPE ALLOWANCE
3 ALLOWANCE ALLOCATION_TYPE
3 MEMBERSHIP_CARD_TYPE ALLOWANCE
3 CHARGE_DETAIL ALLOWANCE
3 CHARGE_DETAIL ALLOWANCE
3 SUBSCRIPTION_PERIOD_STATUS ALLOWANCE
3 SUBSCRIPTION_PERIOD_STATUS ALLOWANCE
3 SUBSCRIPTION_PERIOD_STATUS ALLOWANCE
3 LOAD DISTRIBUTION
3 DISTRIBUTION SUBSCRIPTION
3 PRODUCT_ITEM ALLOWANCE
3 PRODUCT_ITEM ALLOWANCE
3 PRODUCT_ITEM ALLOWANCE
ADJUSTMENT OF DIVISION 3
3 MEMBERSHIP_CARD_TYPE ALLOWANCE
3 DISTRIBUTION CLIENT
4 ALLOWANCE MEMBERSHIP_CARD_TYPE
4 ALLOWANCE MEMBERSHIP_CARD_TYPE
4 ALLOWANCE MISC_CHARGE
4 ALLOWANCE MISC_CHARGE
4 ALLOWANCE PAYMENT_CHANNEL
4 ALLOWANCE PAYMENT_TYPE
4 BREAKDOWN PRODUCT_CODE
4 BREAKDOWN PRODUCT_CODE
4 BREAKDOWN PRODUCT_CODE
4 ALLOWANCE PRODUCT_MASTER
4 ALLOWANCE PRODUCT_MASTER
4 ALLOWANCE PRODUCT_MASTER
4 ALLOWANCE PRODUCT_TYPE
4 ALLOWANCE VEHICLE_CARD_TYPE
4 ALLOWANCE VEHICLE_CARD_TYPE
4 ALLOWANCE VEHICLE_CARD_TYPE
4 ALLOWANCE CHARGE_DETAIL_TYPE
4 ALLOWANCE CHARGE_DETAIL_TYPE
4 ALLOWANCE CHARGE_TYPE
4 ALLOWANCE CHARGE_TYPE
4 DISTRIBUTION CLIENT
4 DISTRIBUTION CLIENT
4 DISTRIBUTION CLIENT
4 DISTRIBUTION CLIENT
4 DISTRIBUTION CLIENT
4 DISTRIBUTION CLIENT
4 DIVISION DISCOUNT
4 DIVISION DISCOUNT
4 ALLOWANCE INVOICE_STATUS_FILTER
4 ALLOWANCE MARKETING_OPTIN
4 ALLOWANCE MARKETING_OPTIN
4 ALLOWANCE MARKETING_OPTIN
4 BREAKDOWN MEMBERSHIP
4 BREAKDOWN MEMBERSHIP
4 BREAKDOWN MEMBERSHIP
4 BREAKDOWN MEMBERSHIP
4 BREAKDOWN MEMBERSHIP
4 ALLOWANCE MEMBERSHIP_CARD_TYPE
4 ALLOWANCE ADJUSTMENT_TYPE
4 ALLOWANCE ALLOCATION_TYPE
4 ALLOWANCE ALLOCATION_TYPE
4 ALLOWANCE ALLOCATION_TYPE
4 ALLOWANCE ALLOCATION_TYPE
4 ALLOWANCE ALLOCATION_TYPE
4 ALLOWANCE ALLOCATION_TYPE
4 ALLOWANCE BILLING_CYCLE_TYPE
4 ALLOWANCE BILLING_CYCLE_TYPE
4 ALLOWANCE BILLING_CYCLE_TYPE
4 ALLOWANCE BILLING_CYCLE_TYPE
4 DISTRIBUTION CAMPAIGN
4 DISTRIBUTION CAMPAIGN
4 DISTRIBUTION CAMPAIGN
4 ALLOWANCE CANCELLED_REASON_TYPE
5 ALLOCATION MEMBERSHIP_CARD_TYPE
5 ALLOWANCE CAMPAIGN
5 ALLOCATION MEMBERSHIP_CARD_TYPE
5 ALLOWANCE CAMPAIGN
5 ALLOWANCE CAMPAIGN
5 ALLOWANCE CAMPAIGN
5 ALLOWANCE CAMPAIGN
5 ALLOWANCE CAMPAIGN
5 ALLOCATION BILLING_CYCLE_TYPE
5 ALLOCATION BILLING_CYCLE_TYPE
5 ALLOCATION BILLING_CYCLE_TYPE
5 ALLOCATION BILLING_CYCLE_TYPE
5 ALLOCATION MEMBERSHIP_CARD_TYPE
5 ALLOCATION MEMBERSHIP_CARD_TYPE
5 ALLOCATION PRODUCT_TYPE
5 ALLOCATION PRODUCT_TYPE
5 ALLOCATION PRODUCT_TYPE
5 CUSTOMER ASSIGNMENT
5 CUSTOMER ASSIGNMENT
5 ALLOCATION MARKETING_OPTIN
5 ALLOCATION MARKETING_OPTIN
5 ALLOCATION MARKETING_OPTIN
5 ALLOCATION MARKETING_OPTIN
5 ALLOCATION MARKETING_OPTIN
5 ALLOCATION MARKETING_OPTIN
5 ALLOCATION MEMBERSHIP_CARD_TYPE
5 ALLOCATION MEMBERSHIP_CARD_TYPE
5 ALLOCATION ALLOCATION_TYPE
5 ALLOCATION ALLOCATION_TYPE
5 ALLOCATION ALLOCATION_TYPE
5 ALLOCATION ALLOCATION_TYPE
5 ALLOCATION BILLING_CYCLE_TYPE
5 ALLOCATION BILLING_CYCLE_TYPE
6 ALLOWANCE CAMPAIGN
6 ALLOWANCE CAMPAIGN
6 ALLOCATION BILLING_CYCLE_TYPE
6 ALLOCATION MARKETING_OPTIN
6 ALLOCATION MEMBERSHIP_CARD_TYPE
6 ALLOCATION BILLING_CYCLE_TYPE
6 ALLOCATION MARKETING_OPTIN
6 ALLOCATION MEMBERSHIP_CARD_TYPE

My requirement is:

MAIN_TABLE = MARKETING_OPTIN
AVAILABLE IN MAX (TLEVEL)
REMOVE DUPLICATES OTHER LEVELS MARKETING_OPTIN

This should apply to all values in the MAIN_TABLE column

Help, please!
still a question is not answered...
Are you looking for this?
```
delete from uniq_temp
where rowid not in
  (
  select max(rowid) keep(dense_rank first order by tlevel desc)
  from uniq_temp
  group by main_table
  );
```

How can I remove duplicate calendars displayed in my list of calendar on my MAC?

How can I remove duplicate calendars displayed in my list of calendar on my MAC?

OS X Version of El 10.11.6 (15-1004)

MacBook Pro (17-inch, mid 2010)

Intel Core i5 to 2.53 GHz

4 GB 1067 MHz DDR3

Macintosh HD

alexmike,

Using iCloud? If so, use iCloud: Apple Advanced calendar and troubleshooting iCal - supported

If this is not the case, what calendars are duplicated?

How can I remove duplicates in Photos massively?

I not only have duplicates in iPhoto and photos, but also in the pictures. In iPhoto, I remove duplicates, why not in the Photos?

You can certainly - or program will do it for you and two require third-party software - for Photos of some of the programs tested and safe are

PowerPhotos

PhotoSweeper for Photos

Duplicate Annihilator for Photos

LN

the option remove duplicates has been removed!

I have just been advised by apple to use this option to remove duplicate songs - the option has been removed. Why?

Hello

You can always find the duplicates. It was move to file > library > show duplicate items.

Jim

3.6.2 the numbers help find and remove duplicates in 2 columns

Could someone help me please. I run a karaoke business. As you may have guessed I have books with many songs, 64 000 and more than 75% of these songs are duplicates so you can imagine by train to sort. Option 1 I could manually go through my list by removing duplicates or option 2 attempt to find a formula that works save me hours of blind deletion. Is there someone out there who can help? It would be much appreciated thanks.

Here is a sample of the document I'm working.

Hi robi.

Here is a solution of Craig s. Ruddock in this discussion Re: duplicates warning formula

Formula in B2 (fill down)

= IF (COUNTIF($A,A) = 1",","duplicate")

Now sort by column A

Remove all but one of the "duplicate" lines for each song.

Kind regards

Ian.

Removing duplicates, I usually have to remove the song duplicate twice to make it disappear. Why?

When you remove duplicate songs, I usually have to remove the song duplicate twice to make it disappear. Why?

When I delete the duplicate song it pops up again. When I erase it a second time he remains missing. After the first removal, he reappeared with a little cloud in an arrow down. Once I have remove that she remains missing.

Is it possible that I can delete a song in one operation?

iTunes 12.3.3 on Mac Pro Tower

Looks like you have an iCloud music library, Subscribe to Match iTunes Apple music (or both). The first time, you probably delete the local copy of the song file (stored on the storage of your computer). But the song still in your iCloud library, so it appears in your list of music library with the cloud with the arrow symbol (which you can click to download it again). You can still play the song streaming from iCloud. The second time, you delete the song completely within your music to iCloud library.

You can see the distinction if you right click on a song (which is stored locally) in iTunes. On the shortcut menu that appears, there are two separate, Remove Download and deletecommands. Remove Download removes the local copy of the song file, but keeps the song in your music to iCloud library. Delete deletes the song completely, with a single action.

How can I remove duplicate songs

How can I remove duplicate from ITunes songs

Way the easiest is to change the view songs and then sort the display by the song title. In this way all the duplicated songs appear together.

To remove the actual songs you can right click on the song and select REMOVE SONG or you can highlight it and press DELETE on your keyboard.

Just be careful if you remove songs that are physically on your computer that you have a backup copy somewhere - incase you ever want to restore.

I have about 14 000 songs in my library, about 4 copies of each of them. Try to remove duplicates, but can only do one at a time. I spent many hours, check all the files I want to delete only to find out that I can't delete them both?

I have about 14 000 songs in my iTunes library, but really there are only about a quarter as much because there are so many duplicates. I don't know how they got there in the first place, and try to remove them is infuriating! I have already spent several hours going by checking all the files I want to remove (thinking that I would delete then all files at once) - only to find out that I still have to delete them one at a time. There must be a better way! Help, please.

If you don't know that you want to delete all checked the songs in your library:
- Create a new smart playlist with the following rules:
  
  This will show then checked all the songs in your library.
- Select all the items in this playlist (Ctrl-A)
- Hold the SHIFT key and press DELETE - follow the prompts to remove songs from your library and (if necessary) your PC media files
In case of problem, you must back up your library before you do just in case the results are not what you expect - see tips to the user of turingtest2 on your iTunes for Windows with SyncToy to backup library for a suitable and recommended method.

There is no 'simple' way to reliably remove duplicates from a library, but see the intelligence in this threadon the use of a scripted for removal of duplicates (for example).

Long-term, try and avoid adding anything in your iTunes library that already exists in it - that's how arise the duplicates (unlike an opinion apparently dispersed, iTunes not of is duplicate anything in normal operation). I've seen several comments suggesting here a few users to correctly copy their library from an old computer to a new one and then add the content of its media files - guaranteed way to finish with a copy of database entries or media files.

How can I quickly remove duplicate photos? High volume of photos in my file on my mac.

Hello. Y at - it an application that I can download that quickly will allow me to remove duplicate photos that I backed up on my folder in my mac? TIA

It has dr.cleaner and photos duplicate cleaner. They are both on the Mac app store.

Try to remove duplicates, "show exact duplicates" check all instances of some songs

I'm trying to remove the duplicates in my iTunes (in thousands) library. I view "replica", but for some songs, it checks all instances of the same song, so I can't delete checked without losing these songs in total. Is there a way to fix this, or what I have to go through the entire library of the song?

Using the latest version of iTunes on a windows PC. I read the instructions for the removal of duplicates, but my situation is not covered.

Thank you

If an entry in a list of audit checks another which makes me suspect that you watch a playlist in which the same elements have been added more than once, rather than the main list of music. The boxes are global in iTunes. One of the phases in my deduper script mentioned below clearly these duplicates of playlist, however, in its current form you need to run it on every playlist where you have this problem if only would you fix this type of problem. For the cleaning of the library to start with the source music in the view of songs and use exact replica. The current version requires counties to disk and the number of titles to match who I'm not sure was always necessary. If you don't see any duplicates that you would expect that maybe why.

Official notice of Apple on the duplicates is here: find and remove duplicates in your iTunes library. This is a manual process and article fails to explain some of the potential pitfalls such as the lost coast and membership of playlist, or sometimes the same file can be represented by multiple entries in the library as well as a removal and recycling the file will break all the others.

Use MAJ > view > show items to reproduce exactly to display the duplicates because it is normally a selection more useful. You must manually select all but one of each group to remove. Sort the list by Date added can make easier select appropriate tracks, but it works better when executed immediately after the dupes were created. If you have several entries in iTunes connected to a same file on the disk hard then don't not send to trash.

Use my DeDuper script (Windows only) If you are not sure, do not want to do it by hand, or want to maintain ratings, play counts and playlist membership. See this background thread , this post for detailed instructions and Please take note of the warning to back up your library before deduping.

(If you don't see the menu bar press ALT to temporarily view or CTRL + B to keep displayed.)

The latest version of the script can put away the dead links as long as there is at least a double live to merge his stats and membership of the playlist and must deal wisely when the same file has been added through multiple paths.

TT2

Remove duplicates based on a condition

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