1.直接创建索引
CREATE INDEX index_name ON table(column(length))
2.修改表结构的方式添加索引
ALTER TABLE table_name ADD INDEX index_name (column(length))
3.创建表的时候同时创建索引
CREATE TABLE `table` (
`id` int(11) NOT NULL AUTO_INCREMENT ,
`title` char(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL ,
`content` text CHARACTER SET utf8 COLLATE utf8_general_ci NULL ,
`time` int(10) NULL DEFAULT NULL ,
PRIMARY KEY (`id`),
INDEX index_name (title(length))
)
4.删除索引
DROP INDEX index_name ON table



