mysql 索引相关
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` )
