Check out example codes for "mysql replace text". It will help you in understanding the concepts better.

Code Example 1

UPDATE products 
SET 
    productDescription = REPLACE(productDescription,
        'abuot',
        'about');

Code Example 2

UPDATE
    table_name
SET
    column_name = REPLACE(column_name, 'text to find', 'text to replace with')
WHERE
    column_name LIKE '%text to find%';

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