How to build a unique index for mysql

This article shows you how to build a unique index in mysql. The content is concise and easy to understand. It will definitely brighten your eyes. I hope you can gain something through the detailed introduction of this article.

How to build a unique index for mysql

1. Add a unique index

Mysql > ALTER TABLE `table_ name` ADD UNIQUE (`column`)

two。 Add primary key index

Mysql > ALTER TABLE `table_ name` ADD PRIMARY KEY (`column`)

3. Add a normal index

Mysql > ALTER TABLE `table_ name` ADD INDEX index_name (`column`)

4. Add full-text index

Mysql > ALTER TABLE `table_ name` ADD FULLTEXT (`column`)

MySQL is a relational database management system developed by the Swedish company MySQL AB and belongs to the products of Oracle. MySQL is one of the most popular relational database management systems. In the aspect of WEB application, MySQL is one of the best RDBMS (Relational Database Management System) application software. MySQL is a relational database management system in which relational databases store data in different tables instead of all data in one large warehouse, which increases speed and flexibility.

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