快速对Mysql添加索引的五个方法

1.添加PRIMARY KEY（主键索引）mysql>ALTER TABLE `table_name` ADD PRIMARY KEY ( `column` )2.添加UNIQUE(唯一索引)mysql>ALTER TABLE `table_name` ADD UNIQUE (`column`)3.添加INDEX(普通索引)mysql>ALTER TABLE `table_name` ADD INDEX index_name ( `column` )4.添加FULLTEXT(全文索引)mysql>ALTER TABLE `table_name` ADD FULLTEXT (`column`)5.添加多列索引mysql>ALTER TABLE `table_name` ADD INDEX index_name ( `column1`, `column2`, `column3` )