How to use DELETE Statement In MariaDB
After identifying duplicate rows, remove them using the DELETE statement. Ensure you have a backup before executing the delete operation.
DELETE FROM indian_states
WHERE id NOT IN (
SELECT MIN(id)
FROM indian_states
GROUP BY state_name, capital
);
Output:
Duplicates Removed
Explanation: This query selects the minimum id for each unique combination of state_name and capital, and then deletes all rows from the indian_states table where the id is not the minimum id for that combination. As we can see that there are no duplicates in our table.
This effectively keeps only one instance of each unique combination and removes duplicates.
How to Delete Duplicate Rows in MariaDB
Duplicate rows in a database can lead to data inconsistencies and inefficiencies. In MariaDB, we can remove duplicate rows using various methods to ensure data integrity and optimize database performance.
In this article, We will explore different techniques to identify and delete duplicate rows in MariaDB with the help of examples and so on.
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