admin 管理员组

文章数量: 1086019


2024年4月14日发(作者：网络命令telnet)

mysql 索引的设计原则

英文回答：

## Index Design Principles.

When designing indexes for a MySQL database, there are

several key principles to keep in mind:

1. Choose the right columns to index.

Not all columns are suitable for indexing. Good

candidates for indexing are:

Columns that are frequently used in WHERE clauses.

Columns that are used in JOIN operations.

Columns that have a high cardinality (i.e., a large

number of unique values)。

2. Index only the columns that are needed.

Indexing too many columns can actually slow down

performance, as the database engine has to maintain more

indexes. Only index the columns that are absolutely

necessary for your queries.

3. Use the correct index type.

There are several different types of indexes available

in MySQL, including:

B-tree indexes: The most common type of index, B-tree

indexes are used for fast lookups and range queries.

Hash indexes: Hash indexes are used for very fast

lookups, but they cannot be used for range queries.

Full-text indexes: Full-text indexes are used for

searching text data.

Choose the right index type for the type of queries


本文标签： 网络 设计 命令 原则 作者

版权声明：本文标题：mysql 索引的设计原则 内容由网友自发贡献，该文观点仅代表作者本人， 转载请联系作者并注明出处：http://www.roclinux.cn/p/1713105925a620150.html， 本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。