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12.2012/ Category:How To/ Tags:sql help Today somebody asked me how to remove duplicates which accidentally made it into a table. The problem is: A normal DELETE won't do, because you would delete both values - not just the one which is in there twice. ...
Usually on daily basis we usually need to perform removing duplicate records from a table. This post can help you to understand “How to Delete Duplicate Records in SQL Server”. Here consider an example for removing duplicate records. IF EXISTS(SELECT 1 FROM sys.sysobjects WHERE TYPE = 'U'...
In this post we look at ways to remove all duplicate rows except one in an SQL database. For all examples in this article, we'll be using the following MySQL "user" table: +---+---+|id|name|+---+---+|1|john||2|david||3|john||4|john||5|wayne||6|david|+---+---+...
To Find the Duplicate Values in SQL, first, let us create a sample table of a company containing duplicate records.
Create a sample table: 1 2 3 4 5 CREATE TABLE tbl_RemoveDuplicate ( ID INTEGER PRIMARY KEY ,Name VARCHAR(150) ); Insert few duplicate records: 1 2 3 4 5 INSERT INTO tbl_RemoveDuplicate VALUES (1,'ABC'),(2,'XYZ') ,(3,'XYZ'),(4,'RFQ') ,(5,'PQR'),(6,'EFG') ,(7...
An explanation of how to find rows with duplicate values in a table using SQL. And delete them. Finishes by showing how to stop people entering new duplicates!
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Hi There, I have a C# application that saves data to a SQL database. I have a button in the application that deletes all duplicate data from the SQL database, although each time it is keeping the l...
Thedistinctkeyword is probably the most common and frequently used SQL function to remove duplicate values in a table. You can remove duplicates from a single column or even duplicate rows in one go. Here's how you can remove duplicates from a single column: ...