mysql|mysql 索引

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 )
【mysql|mysql 索引】froce index 使用
https://www.cnblogs.com/weixiaotao/p/10935151.html

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