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