What is the purpose of making a column unique in PHPmyadmin?

Making a column unique in PHPMyAdmin ensures that each value in that column is unique, meaning no two rows can have the same value in that column. This is commonly used for columns like email addresses or usernames to enforce data integrity and prevent duplicates. To make a column unique, you can set the UNIQUE constraint on that column in the table structure.

ALTER TABLE table_name
ADD UNIQUE (column_name);