Demo MySQL Database
To try the methods mentioned above of deleting duplicate rows in MySQL, we will first create a table and insert duplicate values in it.
This table will be used in examples
CREATE TABLE customers (
customer_id INT,
customer_name VARCHAR(255),
email VARCHAR(255)
);
INSERT INTO customers (customer_id, customer_name, email)
VALUES
(1, 'John Doe', 'john.doe@example.com'),
(2, 'Jane Doe', 'jane.doe@example.com'),
(3, 'Muzamil Amin', 'Muzamilaminitoo@gmail.com'),
(1, 'John Doe', 'john.doe@example.com'),
(4, 'Alice Johnson', 'alice.johnson@example.com'),
(2, 'Jane Doe', 'jane.doe@example.com');
Output:
How to Delete Duplicate Rows in MySQL?
Duplicate rows are a common problem in MySQL databases. Duplicate rows can cause problems with data accuracy and integrity. They can also make it difficult to query and analyze data. They can occur for a variety of reasons, such as:
- Data entry errors
- Data import/export errors
- Database synchronization errors
- Software bugs
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