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mysql创建联合索引

mysql创建联合索引

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Dynastys 2021-10-13 18:31:06 558 分享 版权
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  • mysql> desc books;
    +--------+-------------+------+-----+---------+-------+
    | Field  | Type        | Null | Key | Default | Extra |
    +--------+-------------+------+-----+---------+-------+
    | name   | varchar(30) | YES  | UNI | NULL    |       |
    | author | varchar(20) | YES  |     | NULL    |       |
    | jb     | varchar(20) | YES  |     | NULL    |       |
    +--------+-------------+------+-----+---------+-------+
    3 rows in set (3.20 sec)
    
    mysql> alter table books add index `books_index_name` (`name`,`author`);
    Query OK, 0 rows affected (1 min 14.00 sec)
    Records: 0  Duplicates: 0  Warnings: 0
    
    2021-10-14 07:29:40
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