MySQL - Introduction to several ways to add indexes
- 黄舟Original
- 2017-03-13 13:11:591741browse
1. Add PRIMARY KEY (primary key index )
mysql>ALTER TABLE `table_name` ADD PRIMARY KEY ( `column` )
2. Add UNIQUE (unique index)
mysql>ALTER TABLE `table_name` ADD UNIQUE ( `column` )
3. Add INDEX (normal index)
mysql>ALTER TABLE `table_name` ADD INDEX index_name ( `column` )
4. Add FULLTEXT (full-text index)
mysql>ALTER TABLE `table_name` ADD FULLTEXT ( `column`)
5. Add multi-column index
mysql>ALTER TABLE `table_name` ADD INDEX index_name ( `column1`, `column2`, `column3` )
The above is the detailed content of MySQL - Introduction to several ways to add indexes. For more information, please follow other related articles on the PHP Chinese website!
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：MySQL delete database (delete) 2 methodsNext article：MySQL delete database (delete) 2 methods