Dec 5, 2025 · There are several ways to delete duplicate rows in SQL. Here, we will explain five methods to handle this task effectively. 1. Using GROUP BY and COUNT () Use the GROUP …

SQL delete duplicate rows Deleting duplicate rows in a database table is a common task in SQL, and it’s important for maintaining data integrity. Duplicate rows can occur for various reasons, …

Jan 10, 2025 · This article provides a script that you can use to remove duplicate rows from a SQL Server table.

We can remove the duplicate rows using the following CTE. It removes the rows having the value of [DuplicateCount] greater than 1. We can use the SQL RANK function to remove the …

Oct 29, 2024 · SQL Remove Duplicates: Comprehensive Methods and Best Practices Explore the different methods for filtering out and permanently removing duplicate rows using SQL. Learn …

Jun 27, 2025 · We can use the SQL aggregate functions within a subquery to identify and delete duplicate rows. By using the MIN () or MAX () aggregate functions with a GROUP BY clause, …

2 days ago · SQL engines grew stronger at handling this once window functions became part of everyday work, because they make it possible to scan a table, form clusters, number rows …

6 days ago · Duplicate rows in SQL Server tables are a common headache for database administrators and developers. They can skew analytics, waste storage, and cause application …

Jul 25, 2025 · Explore multiple SQL Server techniques to identify and eliminate duplicate records from your tables. Learn about CTEs, ROW_NUMBER, temporary tables, and more with …

The SQL DISTINCT keyword is a simple but powerful tool to remove duplicate rows from query results. When you want unique values — for example, a list of unique countries from a …