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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2answers
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remove duplicate rows in mysql table that does not contain primary key

I have a table item having just one column name:- name ----- toys shirt mobile Shirt speaker Toys .... .... I am trying to delete duplicate rows except one duplicated record with the help of below ...
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1answer
8k views

Optimal way to ignore duplicate inserts?

Background This problem relates to ignoring duplicate inserts using PostgreSQL 9.2 or greater. The reason I ask is because of this code: -- Ignores duplicates. INSERT INTO db_table ...
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5answers
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How do I copy my SQL Azure database to a local SQL Server instance?

I have an OLTP database hosted on a SQL Azure instance. I want to pull a copy of the database down from the cloud so I can run some heavy extracts and OLAP-style queries against it without impacting ...
1
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1answer
964 views

Duplicate entry in mysql slave

I have a mysql master-slave replication setup. when I checked "show slave status", I got the result as "Slave_Sql_running:No" and Last error as "Duplicate entry 'x' on query." But when I tried to ...