MariaDB Unique Index and Unique Constraint
Unique Index
A unique index in MariaDB is a database object that ensures the uniqueness of values in one or more columns. It allows the database to optimize queries for unique values and helps maintain data integrity.
Unique Constraint
A unique constraint is almost a unique index with a specific name. It provides a more clear and detailed way of ensuring uniqueness, making it easier to understand the purpose of the constraint.
Syntax:
ALTER TABLE tbl_name
ADD CONSTRAINT constraint_name
UNIQUE (column1, column2, ...);
Example:
ALTER TABLE employees
ADD CONSTRAINT unique_email
UNIQUE (empEmail);
Output:
Mariadb Unique Contraints
Explanation: In the above Query, We have add the Constraints which is UNIQUE to the empEmail Columns as a unique_email
MariaDB Unique Index
MariaDB is a fast, scalable, open-source community-supported relational database management system that’s also an enhanced version of MySQL. Content management systems (CMS) are a key application of MariaDB. A CMS is a publication system through which web creators can push and manage large quantities of content on a website. In this article, we will understand the Unique Index in MariaDB along with its syntax, examples, and so on.
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