You may use the below sample query to remove duplicate records.DELETE FROM your_table WHERE (unique_column1, unique_column2, created_at) IN (SELECT unique_column1, unique_column2, MAX(created_at)FROM your_tableGROUP BY unique_column1, unique_column2HAVING COUNT(*) > 1 );This SQL statem...
Here is my SQL Command to remove the duplicate data records from the database for the Purge Duplicates button event: SqlCommand frsCommand = new SqlCommand("DELETE FROM tblAddress WHERE A_Id NOT IN (SELECT MAX(A_Id) FROM tblAddress GROUP BY colAddress)SELECT * FROM tblAddress ORDER BY cre...
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|+---+---+...
Adding multiple items to Dictionary Adding multiple rows to a datatable Adding multiple worksheet to Excel using Openxml Adding new columns dynamically Adding results of SQL query to an iEnumerable string adding scrollbar to dropdownlist Adding values inside the datatable to a Dictionary in VB.net ...
-- Note that the choice of sort column is up to you! “Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.”- Gail Shaw For fast, accurate and documented assistance in answering your questions, please read...
Step 1:In this method, we can see two respective columns, i.e. First Name and Last Name, where we have to remove redundancy. Navigate to the data tab option present in the toolbar. Step 2:After selecting the data tab, click on the remove duplicate option highlighted in the screenshot...
"How do I find duplicate rows using SQL?" This is often closely followed with: "How do I delete all but one of the copies?" In this post we'll look at how you can use SQL to: Find duplicate rows Delete duplicate rows Stop people storing new duplicates!
Let us consider the SQL Table company and try to find its duplicate records using Self Join. SQL Query SELECT DISTINCT a.* FROM Company a JOIN Company b ON a.Name = b.Name AND a.Department = b.Department WHERE a.ID <> b.ID; ...
SQL Data Types: A Beginner’s Guide How to Create and Drop Tables in SQL? SELECT Query in SQL – Master the Basics SQL SELECT DISTINCT SQL INSERT INTO Statement WHERE Clause in SQL SQL UPDATE Statement SQL DELETE Statement DELETE Query and TRUNCATE Function in SQL ...
In this post, we are going to see how to select distinct values from SQL queries/statements. One of the easiest ways to select distinct values is using the DISTINCT keyword. Let's explore this keyword first. DISTINCT DISTINCT is used to remove duplicate rows from the SELECT query and only...