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mysql语句添加索引


  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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