suresh In a database, a primary key and a unique key serve as constraints to enforce data integrity.
A primary key uniquely identifies each record in a table and ensures that there are no duplicate values in the column. Only one primary key can be defined for a table.
On the other hand, a unique key ensures that all values in a column are unique, but unlike a primary key, it allows null values. Multiple unique keys can be defined in a table.
From an SEO perspective, understanding the distinction between a primary key and a unique key is crucial for effective database management and optimization. Properly defining these keys can improve search engine rankings by ensuring data accuracy, facilitating faster queries, and enhancing the overall user experience on websites or applications powered by the database.
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