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mysql主键索引
mysql主键索引
Mysql主键索引
、唯一索引、普通索引、全文索引、组合索引的区别
毕竟不可能只对
数据库
进行单条记录的操作.
Mysql
常见索引有:
主键索引
、唯一索引、普通索引、全文索引、组合索引 PRIMARY KEY(
主键索引
)ALTER TABLE `table_name` ADD PRIMARY KEY(`column`)UNIQUE(唯一索引)ALTER TABLE `table_name` ADD...
mysql
索引(六)
主键索引
主键索引
(PRIMARY):它 是一种特殊的唯一索引,不允许有空值。全文索引(FULLTEXT):可用于 MyISAM 表,
mysql
5.6之后也可用于innodb表,用于在一篇文章中,检索文本信息的,针对较大的数据,生成全文索引很耗时和空间。联合(组合)索引:...
FAQ系列|
MySQL
索引之
主键索引
导读在
MySQL
里,
主键索引
和辅助索引分别是什么意思,有什么区别?上次的分享我们介绍了聚集索引和非聚集索引的区别,本次我们继续介绍
主键索引
和辅助索引的区别。1、
主键索引主键索引
,简称主键,原文是PRIMARY KEY,由一个或多个列组成,...
FAQ系列|
MySQL
索引之
主键索引
导读在
MySQL
里,
主键索引
和辅助索引分别是什么意思,有什么区别?上次的分享我们介绍了聚集索引和非聚集索引的区别,本次我们继续介绍
主键索引
和辅助索引的区别。1、
主键索引主键索引
,简称主键,原文是PRIMARY KEY,由一个或多个列组成,...
FAQ系列|
MySQL
索引之
主键索引
导读在
MySQL
里,
主键索引
和辅助索引分别是什么意思,有什么区别?上次的分享我们介绍了聚集索引和非聚集索引的区别,本次我们继续介绍
主键索引
和辅助索引的区别。1、
主键索引主键索引
,简称主键,原文是PRIMARY KEY,由一个或多个列组成,...
FAQ系列|
MySQL
索引之
主键索引
导读在
MySQL
里,
主键索引
和辅助索引分别是什么意思,有什么区别?上次的分享我们介绍了聚集索引和非聚集索引的区别,本次我们继续介绍
主键索引
和辅助索引的区别。1、
主键索引主键索引
,简称主键,原文是PRIMARY KEY,由一个或多个列组成,...
FAQ系列|
MySQL
索引之
主键索引
导读在
MySQL
里,
主键索引
和辅助索引分别是什么意思,有什么区别?上次的分享我们介绍了聚集索引和非聚集索引的区别,本次我们继续介绍
主键索引
和辅助索引的区别。1、
主键索引主键索引
,简称主键,原文是PRIMARY KEY,由一个或多个列组成,...
FAQ系列|
MySQL
索引之
主键索引
导读在
MySQL
里,
主键索引
和辅助索引分别是什么意思,有什么区别?上次的分享我们介绍了聚集索引和非聚集索引的区别,本次我们继续介绍
主键索引
和辅助索引的区别。1、
主键索引主键索引
,简称主键,原文是PRIMARY KEY,由一个或多个列组成,...
FAQ系列|
MySQL
索引之
主键索引
导读在
MySQL
里,
主键索引
和辅助索引分别是什么意思,有什么区别?上次的分享我们介绍了聚集索引和非聚集索引的区别,本次我们继续介绍
主键索引
和辅助索引的区别。1、
主键索引主键索引
,简称主键,原文是PRIMARY KEY,由一个或多个列组成,...
FAQ系列|
MySQL
索引之
主键索引
导读在
MySQL
里,
主键索引
和辅助索引分别是什么意思,有什么区别?上次的分享我们介绍了聚集索引和非聚集索引的区别,本次我们继续介绍
主键索引
和辅助索引的区别。1、
主键索引主键索引
,简称主键,原文是PRIMARY KEY,由一个或多个列组成,...
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云数据库RDS MySQL版
MySQL 是全球最受欢迎的开源数据库,阿里云MySQL版 通过深度的内核优化和独享实例提供稳定极致的数据库性能,同时灵活的部署架构及产品形态,可满足不同场景下的数据库需求。
了解详情
管理控制台
在线咨询
最新活动
MySQL 1年仅19.9元
数据库专场优惠
快速入门
帮助文档
快速入门
最佳实践
SaaS上云数据库
数据库客户案例合集
产品推荐
云数据库PolarDB
云原生数据仓库MySQL
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云数据库RDS MySQL版
MySQL 是全球最受欢迎的开源数据库,阿里云MySQL版 通过深度的内核优化和独享实例提供稳定极致的数据库性能,同时灵活的部署架构及产品形态,可满足不同场景下的数据库需求。
了解详情
管理控制台
在线咨询
最新活动
MySQL 1年仅19.9元
数据库专场优惠
快速入门
帮助文档
快速入门
最佳实践
SaaS上云数据库
数据库客户案例合集
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云数据库PolarDB
云原生数据仓库MySQL