Introduction to the Duplicate Rows

Duplicate rows in an SQLite database are defined as multiple records within a table that have the same values in one or more columns. These duplicates can arise due to various reasons, such as data entry errors, inconsistencies in data sources or incomplete data normalization processes. Identifying and managing duplicate rows is important for maintaining data integrity and ensuring efficient database operations. we will learn how to remove duplicate records from the table easily.

Syntax:

DELETE FROM students
WHERE rowid NOT IN (
    SELECT MIN(rowid)
    FROM students
    GROUP BY first_name, last_name
);

Explanation: This SQL query deletes duplicate rows from the “students” table by retaining only the records with the minimum “rowid” for each unique combination of “first_name” and “last_name”. It ensures that only the earliest entry for each distinct student name combination is preserved, effectively eliminating duplicate entries

By following these steps, we’ll effectively declutter our database and ensure that each piece of data is unique, just like ensuring each book on the shelf is distinct. This process not only improves data organization but also enhances the efficiency and performance of our database operations.

SQLite is an open-source and serverless database system that does not require any server to perform various queries also it is widely used in the development of embedded software like television and mobile phones Sometimes it might happen that we by mistake insert multiple times similar data into tables which leads to the problem of inconsistency and data integrity. In this article, we will learn about How to delete duplicate rows in SQLite with its syntax examples and so on.