The Duplication tag covers the topic of duplicated data and the strategies involved in removing the duplicates, often referred to as deduplication or simply dedupe.

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How to prevent duplicates while storing result from different application

For my case multiple application uses data from db based on date, this data is date specific so if for a date data exist application should just read it otherwise it should fetch information from ...
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2answers
55 views

Duplicate databases error

I have two Oracle 11gR2 databases on separate servers. I want to duplicate these databases. For this, I do these steps : In auxiliary db : create password file with password that is same if ...
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2answers
350 views

Make Oracle backup files available for duplicate

I have a Red Hat Enterprise Linux server with Oracle 10.2.0.5 and a database on it (SID is TNATEST). I have a remote CentOS server with Oracle 10.2.0.5 on it that I want to duplicate TNATEST to. The ...
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1answer
72 views

Marking duplicate records

I have a list of things, some of which are duplicates. create table things ( id int primary key, title text not null, author text not null, duplicate_of int null references things(id) ); ...
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1answer
3k views

Duplicate database for standby returns error ORA-19625: error identifying file /home/oracle/stdbyctrl.ctl

I'm working on creating duplication scripts for standby purposes. and it's constantly failing even though the backups are located in the exact same folder. DB structure is identical and spfile is ...
0
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1answer
97 views

Delete duplicate with same ID PHP/PDO/MYSQL

I'm new to databases and I need your help I'm working on a website and I have few problems. I'm using PDO. There is a user table, with unique ID, name and password. User enters his username and ...
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1answer
83 views

Mysql: Create a view with multiple self joins without duplicates in result

Just to clarify i can't change the tables structure, so please leave out the "you should change your tables to this and that" answers, thank you. So i have a table entities_attributes_values where an ...
0
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1answer
78 views

Does PostgreSQL have a variable character storage layer that optimizes storage space by automatic dedupe?

My application has a Product and a Purchased table. The Purchased table includes a full copy of the Product row at time of purchase, so that, even if a product name or description was changed, the ...
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1answer
3k views

Oracle Duplicate Database with no archived logs

I am trying to perform a duplicate operation from one server to another (testing disaster recovery) on oracle 11g. I am very much still learning about Oracle. The system is not in production, it is ...
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1answer
57 views

Working out Duplicated Data in a Customer Data Base

I have a database in SQL2008 of customers, There is an ID number for the customer. What im trying to do is to create a NEWID field. We have duplicated customers that have different ID fields, I am ...
0
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1answer
182 views

duplicate entry issue with large mysql database table

I have a very large my sql database table. The other day, for no apparent reason, I now keep getting :- Duplicate entry '148245' for key 'PRIMARY' If I remove the entry at with primary of 148245, ...
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1answer
290 views

Why Do I Still Get a Duplicate Entry Error When There is No Duplicate Entry?

I am trying to insert this data into my database: https://docs.google.com/spreadsheet/ccc?key=0AjQflI82acM3dFI1Mk04dWlYSFJtM0hsZ0g4ZlExMWc&usp=sharing I receive the following error: 1062 - ...
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0answers
28 views

MS Access database returns multiple entries for same person with more than one child

I know this is a very basic question, but I've watched about six Access database videos and still can't find the answer. I'm a volunteer creating a membership database for a church in MS Access. The ...
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0answers
47 views

Finding Duplicate URLs

The following URL varchar(2000) row holds URL values in a 3rd party database that I'm accessing directly, i.e. going around the HTTP API. MySQL [database]> desc TABLE; ...
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0answers
635 views

Duplicate GROUP_CONCAT values

Writing a plugin for Wordpress using a custom post type and an additional alias table to hold repetition of the post events. The problem comes with duplicate post meta values. wp_post_meta table: ...
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0answers
130 views

Looking for a recipe to merge multiple rows to single row

I have a aggregation table that is written by multiple processors (around 20). Each row has a composite key - location-id, campaign-id,... and aggregate stats about it. I need to merge the ...
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0answers
77 views

Finding duplicate data

I have noticed dup’s generated in my mail system. some service was causing duplicate calls to my insert proc and generated multiple duplicate messages with about a 4 mili-second difference in a date ...
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0answers
135 views

Synchronization between master and backup server

I am searching for an option to synchronize data between production server and backup server automatically. Does somebody know a method, how I can do this: if I delete, insert or update a record it ...
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0answers
488 views

Duplication Oracle Database to remote host

I have two scenarios. 1 ) Let's say , I have the same file system and same SID on both nodes. I've created any directories necessary for start the duplicate database. First I used command below. ...