阿里云
>
mysql
>
数据mysql优化
数据mysql优化
mysql数据优化
-
数据库
结构的
优化
1,比如存时间类型的就使用int类型 其中
mysql
的两个函数可以拿来使用 unix_timestamp 将时间日期转化为时间戳 from_unixtime 将时间戳转化为日期 2.ip地址存储用bigint类型 说白了,就是存储的字节越短越好
优化mysql数据
表的shell脚本
由于公司
数据库
中的
数据
量较大,定期对公司的
mysql数据库
中的
数据
表进行
优化
操作(关于optimize的描述如下所示),
数据库
中有300多张
数据
表,手工去操作显然不太现实,用脚本来执行效率还是很不错的,脚本如下:
mysql
手册中关于 OPTIMIZE 的...
关于
优化MySql数据
表设计问题
诚实、可爱小丽-可爱小王、小明-老实小张、小丽-美丽小张、小王、小丽-俊俏 此时,找小明可以找到标签:诚实、可爱、老实找小明&小王可以找到:老实找小张&小丽可以找到:美丽找小张&小丽&小王可以找到:俊俏请教:这样的
数据
表如何设计会...
Mysql数据
查询
优化
——索引
优化
通过执行计划可知is not null 的
数据
大概有1282633条,
Mysql优化
器认为如果使用索引然后再回表查询 不如直接全表扫描快,而is null 时才有大概6614条
数据
。由可以得出结论
MySQL
中决定使不使用某个索引执行查询的依据很简单:就是成本够不够...
【
MySQL
】
数据优化
-索引-
数据
200万-面试题(2)
Mysql数据
查询
优化
——索引的
数据
结构
正文什么是索引在关系
数据库
中,索引是一种单独的、物理的对
数据库
表中一列或多列的值进行排序的一种存储结构,它是某个表中一列或若干列值的集合和相应的指向表中物理标识这些值的
数据
页的逻辑指针清单。索引的作用相当于图书的目录,可以...
云数据库RDS
MySQL
_关系型数据库_
MySQL
源码
优化
版_
MySQL
下载-阿里云
云数据库RDS
MySQL
_关系型数据库_
MySQL
源码
优化
版_
MySQL
下载-阿里云
云数据库RDS
MySQL
_关系型数据库_
MySQL
源码
优化
版_
MySQL
下载-阿里云 入门级 企业级,版 新人专享 负载与资源动态匹配的按量付费,对于间歇、潮汐场景节省大量成本 RCU0-8 ...
【
MySQL
】
数据优化
-索引-
数据
200万-面试题(1)
1.面试题
数据库
表结构 CREATE TABLE `customers1`(-身份证 `id` char(20)NOT NULL,-姓名 `name` varchar(20)NOT NULL,-城市名 `city` varchar(10)NOT NULL,-性别:1(男),0(女)`gender` tinyint(4)NOT NULL,-出生日期 `birthdate` date...
MySQL
面试常见之海量
数据优化
1.SQL
优化
避免使用OR不要使用like '%xx'%在左边时索引失效使用复合索引时没有遵循最左匹配原则不要让
数据
类型出现隐式转化不要在索引字段上使用not,,!一样会导致索引失效分解关联查询小表驱动大表 即小的
数据
集驱动大的
数据
集2.事务级别...
MySQL
两千万
数据优化
&迁移
2000W
数据
对于
MySQL
来说很尴尬,因为合理的创建索引速度还是挺快的,再怎么
优化
速度也得不到多大提升。不过这些
数据
有大量的冗余字段和错误信息,极不方便做统计和分析。所以我需要创建一张新表,把旧表中的
数据
一条一条取出来
优化
后放回新...
1
2
3
4
...
21
>
mysql更多"优化"相关
.
mysqlexplain优化
.
mysqlnse优化
.
mysql存储过程优化
.
mysql优化查找
.
mysqlorder优化
.
descmysql优化
.
mysqlpage优化
.
mysqltable优化
.
mysqlflush优化
.
优化mysql多个
.
mysql优化temporary
.
mysqlbuffer优化
.
mysql子系统优化
.
mysql场景优化
.
zabbixmysql优化
mysql数据优化相关内容
.
mysqlvarchar数据
.
数据mysqlgroup
.
Redismysql数据
.
frankmysql数据
.
mysqlnext数据
.
Dataxmysql数据
.
mysqllimit数据
.
mysqlwhere数据
.
mysqldelete数据
.
hivemysql数据
.
javamysql数据
.
mysqlnull数据
.
数据mysqljoin
.
mysql数据job
.
mysqlselect数据
您可能感兴趣
.
常用mysql
.
mysql触发器
.
修改mysql密码
.
mysql云服务器
.
mysql动态sql
.
mysql事务
.
mysql复制
.
mysql学习
{"moduleinfo":{"card_count":[{"count_phone":1,"count":1}],"search_count":[{"count_phone":4,"count":4}]},"card":[{"des":"阿里云数据库专家保驾护航,为用户的数据库应用系统进行性能和风险评估,参与配合进行数据压测演练,提供数据库优化方面专业建议,在业务高峰期与用户共同保障数据库系统平稳运行。","link1":"https://www.aliyun.com/service/optimization/database","link":"https://www.aliyun.com/service/chiefexpert/database","icon":"https://img.alicdn.com/tfs/TB1a5ZfonnI8KJjy0FfXXcdoVXa-100-100.png","btn2":"数据库紧急救援服务","tip":"还有更多专家帮助您解决云上业务问题:
立即查看
","btn1":"云上数据库优化服务","link2":"https://www.aliyun.com/service/databaserescue","title":"数据库专家服务"}],"search":[{"txt":"安全首席专家","link":"https://www.aliyun.com/service/chiefexpert/security"},{"txt":"中间件首席专家","link":"https://www.aliyun.com/service/chiefexpert/middleware"},{"txt":"系统与平台首席专家","link":"https://www.aliyun.com/service/chiefexpert/platform"},{"txt":"存储首席专家","link":"https://www.aliyun.com/service/chiefexpert/storage"}],"countinfo":{"search":{"length_pc":0,"length":0},"card":{"length_pc":0,"length":0}},"simplifiedDisplay":"newEdition","newCard":[{"link":"https://www.aliyun.com/product/rds/mysql","icon":"","contentLink":"https://www.aliyun.com/product/rds/mysql","title":"云数据库RDS MySQL版","des":"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。","btn1":"了解详情","link1":"https://www.aliyun.com/product/rds/mysql","btn2":"管理控制台","link2":"https://rdsnext.console.aliyun.com/#/rdsList/cn-hangzhou/basic/","btn3":"在线咨询","link3":"https://www.aliyun.com/core/online-consult?spm=5176.8789780.7y9jhqsfz.115.47ea55caeL2Mfu&from=OVtXEBmlH8","infoGroup":[{"infoName":"最新活动","infoContent":{"firstContentName":"MySQL 1年仅19.9元","firstContentLink":"https://rds-buy.aliyun.com/nextBuy#/create/rds/mysql?initData={\"data\":{\"rds_activityId\":\"1910005604434903\",\"rds_region\":\"cn-shenzhen\",\"rds_dbtype\":\"mysql\",\"rds_dbversion\":\"8.0\",\"rds_web_type\":\"1\",\"rds_class\":\"mysql.n1.micro.1\",\"rds_storage\":\"20\",\"rds_nodetype\":\"Basic\",\"duration\":12}}","lastContentName":"数据库专场优惠","lastContentLink":"https://www.aliyun.com/database/dbfirstbuy"}},{"infoName":"快速入门","infoContent":{"firstContentName":"帮助文档","firstContentLink":"https://help.aliyun.com/product/26090.html","lastContentName":"快速入门","lastContentLink":"https://help.aliyun.com/document_detail/26174.html"}},{"infoName":"最佳实践","infoContent":{"firstContentName":"SaaS上云数据库","firstContentLink":"https://www.aliyun.com/solution/database/saasdb","lastContentName":"数据库客户案例合集","lastContentLink":"https://www.aliyun.com/database/case"}},{"infoName":"产品推荐","infoContent":{"firstContentName":"云数据库PolarDB","lastContentName":"云原生数据仓库MySQL","firstContentLink":"https://www.aliyun.com/product/polardb","lastContentLink":"https://www.aliyun.com/product/ads"}}],"ifIcon":"img","iconImg":"https://img.alicdn.com/imgextra/i4/O1CN01okTDy31OzS9njXqrV_!!6000000001776-2-tps-48-48.png"}],"visual":{"textColor":"dark","topbg":""}}
{"$env":{"JSON":{}},"$page":{"env":"production"},"$context":{"moduleinfo":{"card_count":[{"count_phone":1,"count":1}],"search_count":[{"count_phone":4,"count":4}]},"card":[{"des":"阿里云数据库专家保驾护航,为用户的数据库应用系统进行性能和风险评估,参与配合进行数据压测演练,提供数据库优化方面专业建议,在业务高峰期与用户共同保障数据库系统平稳运行。","link1":"https://www.aliyun.com/service/optimization/database","link":"https://www.aliyun.com/service/chiefexpert/database","icon":"https://img.alicdn.com/tfs/TB1a5ZfonnI8KJjy0FfXXcdoVXa-100-100.png","btn2":"数据库紧急救援服务","tip":"还有更多专家帮助您解决云上业务问题:
立即查看
","btn1":"云上数据库优化服务","link2":"https://www.aliyun.com/service/databaserescue","title":"数据库专家服务"}],"search":[{"txt":"安全首席专家","link":"https://www.aliyun.com/service/chiefexpert/security"},{"txt":"中间件首席专家","link":"https://www.aliyun.com/service/chiefexpert/middleware"},{"txt":"系统与平台首席专家","link":"https://www.aliyun.com/service/chiefexpert/platform"},{"txt":"存储首席专家","link":"https://www.aliyun.com/service/chiefexpert/storage"}],"countinfo":{"search":{"length_pc":0,"length":0},"card":{"length_pc":0,"length":0}},"simplifiedDisplay":"newEdition","newCard":[{"link":"https://www.aliyun.com/product/rds/mysql","icon":"","contentLink":"https://www.aliyun.com/product/rds/mysql","title":"云数据库RDS MySQL版","des":"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。","btn1":"了解详情","link1":"https://www.aliyun.com/product/rds/mysql","btn2":"管理控制台","link2":"https://rdsnext.console.aliyun.com/#/rdsList/cn-hangzhou/basic/","btn3":"在线咨询","link3":"https://www.aliyun.com/core/online-consult?spm=5176.8789780.7y9jhqsfz.115.47ea55caeL2Mfu&from=OVtXEBmlH8","infoGroup":[{"infoName":"最新活动","infoContent":{"firstContentName":"MySQL 1年仅19.9元","firstContentLink":"https://rds-buy.aliyun.com/nextBuy#/create/rds/mysql?initData={\"data\":{\"rds_activityId\":\"1910005604434903\",\"rds_region\":\"cn-shenzhen\",\"rds_dbtype\":\"mysql\",\"rds_dbversion\":\"8.0\",\"rds_web_type\":\"1\",\"rds_class\":\"mysql.n1.micro.1\",\"rds_storage\":\"20\",\"rds_nodetype\":\"Basic\",\"duration\":12}}","lastContentName":"数据库专场优惠","lastContentLink":"https://www.aliyun.com/database/dbfirstbuy"}},{"infoName":"快速入门","infoContent":{"firstContentName":"帮助文档","firstContentLink":"https://help.aliyun.com/product/26090.html","lastContentName":"快速入门","lastContentLink":"https://help.aliyun.com/document_detail/26174.html"}},{"infoName":"最佳实践","infoContent":{"firstContentName":"SaaS上云数据库","firstContentLink":"https://www.aliyun.com/solution/database/saasdb","lastContentName":"数据库客户案例合集","lastContentLink":"https://www.aliyun.com/database/case"}},{"infoName":"产品推荐","infoContent":{"firstContentName":"云数据库PolarDB","lastContentName":"云原生数据仓库MySQL","firstContentLink":"https://www.aliyun.com/product/polardb","lastContentLink":"https://www.aliyun.com/product/ads"}}],"ifIcon":"img","iconImg":"https://img.alicdn.com/imgextra/i4/O1CN01okTDy31OzS9njXqrV_!!6000000001776-2-tps-48-48.png"}],"visual":{"textColor":"dark","topbg":""}}}
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
{"moduleinfo":{"card_count":[{"count_phone":1,"count":1}],"search_count":[{"count_phone":4,"count":4}]},"card":[{"des":"阿里云数据库专家保驾护航,为用户的数据库应用系统进行性能和风险评估,参与配合进行数据压测演练,提供数据库优化方面专业建议,在业务高峰期与用户共同保障数据库系统平稳运行。","link1":"https://www.aliyun.com/service/optimization/database","link":"https://www.aliyun.com/service/chiefexpert/database","icon":"https://img.alicdn.com/tfs/TB1a5ZfonnI8KJjy0FfXXcdoVXa-100-100.png","btn2":"数据库紧急救援服务","tip":"还有更多专家帮助您解决云上业务问题:
立即查看
","btn1":"云上数据库优化服务","link2":"https://www.aliyun.com/service/databaserescue","title":"数据库专家服务"}],"search":[{"txt":"安全首席专家","link":"https://www.aliyun.com/service/chiefexpert/security"},{"txt":"中间件首席专家","link":"https://www.aliyun.com/service/chiefexpert/middleware"},{"txt":"系统与平台首席专家","link":"https://www.aliyun.com/service/chiefexpert/platform"},{"txt":"存储首席专家","link":"https://www.aliyun.com/service/chiefexpert/storage"}],"countinfo":{"search":{"length_pc":0,"length":0},"card":{"length_pc":0,"length":0}},"simplifiedDisplay":"newEdition","newCard":[{"link":"https://www.aliyun.com/product/rds/mysql","icon":"","contentLink":"https://www.aliyun.com/product/rds/mysql","title":"云数据库RDS MySQL版","des":"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。","btn1":"了解详情","link1":"https://www.aliyun.com/product/rds/mysql","btn2":"管理控制台","link2":"https://rdsnext.console.aliyun.com/#/rdsList/cn-hangzhou/basic/","btn3":"在线咨询","link3":"https://www.aliyun.com/core/online-consult?spm=5176.8789780.7y9jhqsfz.115.47ea55caeL2Mfu&from=OVtXEBmlH8","infoGroup":[{"infoName":"最新活动","infoContent":{"firstContentName":"MySQL 1年仅19.9元","firstContentLink":"https://rds-buy.aliyun.com/nextBuy#/create/rds/mysql?initData={\"data\":{\"rds_activityId\":\"1910005604434903\",\"rds_region\":\"cn-shenzhen\",\"rds_dbtype\":\"mysql\",\"rds_dbversion\":\"8.0\",\"rds_web_type\":\"1\",\"rds_class\":\"mysql.n1.micro.1\",\"rds_storage\":\"20\",\"rds_nodetype\":\"Basic\",\"duration\":12}}","lastContentName":"数据库专场优惠","lastContentLink":"https://www.aliyun.com/database/dbfirstbuy"}},{"infoName":"快速入门","infoContent":{"firstContentName":"帮助文档","firstContentLink":"https://help.aliyun.com/product/26090.html","lastContentName":"快速入门","lastContentLink":"https://help.aliyun.com/document_detail/26174.html"}},{"infoName":"最佳实践","infoContent":{"firstContentName":"SaaS上云数据库","firstContentLink":"https://www.aliyun.com/solution/database/saasdb","lastContentName":"数据库客户案例合集","lastContentLink":"https://www.aliyun.com/database/case"}},{"infoName":"产品推荐","infoContent":{"firstContentName":"云数据库PolarDB","lastContentName":"云原生数据仓库MySQL","firstContentLink":"https://www.aliyun.com/product/polardb","lastContentLink":"https://www.aliyun.com/product/ads"}}],"ifIcon":"img","iconImg":"https://img.alicdn.com/imgextra/i4/O1CN01okTDy31OzS9njXqrV_!!6000000001776-2-tps-48-48.png"}],"visual":{"textColor":"dark","topbg":""}}
{"$env":{"JSON":{}},"$page":{"env":"production"},"$context":{"moduleinfo":{"card_count":[{"count_phone":1,"count":1}],"search_count":[{"count_phone":4,"count":4}]},"card":[{"des":"阿里云数据库专家保驾护航,为用户的数据库应用系统进行性能和风险评估,参与配合进行数据压测演练,提供数据库优化方面专业建议,在业务高峰期与用户共同保障数据库系统平稳运行。","link1":"https://www.aliyun.com/service/optimization/database","link":"https://www.aliyun.com/service/chiefexpert/database","icon":"https://img.alicdn.com/tfs/TB1a5ZfonnI8KJjy0FfXXcdoVXa-100-100.png","btn2":"数据库紧急救援服务","tip":"还有更多专家帮助您解决云上业务问题:
立即查看
","btn1":"云上数据库优化服务","link2":"https://www.aliyun.com/service/databaserescue","title":"数据库专家服务"}],"search":[{"txt":"安全首席专家","link":"https://www.aliyun.com/service/chiefexpert/security"},{"txt":"中间件首席专家","link":"https://www.aliyun.com/service/chiefexpert/middleware"},{"txt":"系统与平台首席专家","link":"https://www.aliyun.com/service/chiefexpert/platform"},{"txt":"存储首席专家","link":"https://www.aliyun.com/service/chiefexpert/storage"}],"countinfo":{"search":{"length_pc":0,"length":0},"card":{"length_pc":0,"length":0}},"simplifiedDisplay":"newEdition","newCard":[{"link":"https://www.aliyun.com/product/rds/mysql","icon":"","contentLink":"https://www.aliyun.com/product/rds/mysql","title":"云数据库RDS MySQL版","des":"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。","btn1":"了解详情","link1":"https://www.aliyun.com/product/rds/mysql","btn2":"管理控制台","link2":"https://rdsnext.console.aliyun.com/#/rdsList/cn-hangzhou/basic/","btn3":"在线咨询","link3":"https://www.aliyun.com/core/online-consult?spm=5176.8789780.7y9jhqsfz.115.47ea55caeL2Mfu&from=OVtXEBmlH8","infoGroup":[{"infoName":"最新活动","infoContent":{"firstContentName":"MySQL 1年仅19.9元","firstContentLink":"https://rds-buy.aliyun.com/nextBuy#/create/rds/mysql?initData={\"data\":{\"rds_activityId\":\"1910005604434903\",\"rds_region\":\"cn-shenzhen\",\"rds_dbtype\":\"mysql\",\"rds_dbversion\":\"8.0\",\"rds_web_type\":\"1\",\"rds_class\":\"mysql.n1.micro.1\",\"rds_storage\":\"20\",\"rds_nodetype\":\"Basic\",\"duration\":12}}","lastContentName":"数据库专场优惠","lastContentLink":"https://www.aliyun.com/database/dbfirstbuy"}},{"infoName":"快速入门","infoContent":{"firstContentName":"帮助文档","firstContentLink":"https://help.aliyun.com/product/26090.html","lastContentName":"快速入门","lastContentLink":"https://help.aliyun.com/document_detail/26174.html"}},{"infoName":"最佳实践","infoContent":{"firstContentName":"SaaS上云数据库","firstContentLink":"https://www.aliyun.com/solution/database/saasdb","lastContentName":"数据库客户案例合集","lastContentLink":"https://www.aliyun.com/database/case"}},{"infoName":"产品推荐","infoContent":{"firstContentName":"云数据库PolarDB","lastContentName":"云原生数据仓库MySQL","firstContentLink":"https://www.aliyun.com/product/polardb","lastContentLink":"https://www.aliyun.com/product/ads"}}],"ifIcon":"img","iconImg":"https://img.alicdn.com/imgextra/i4/O1CN01okTDy31OzS9njXqrV_!!6000000001776-2-tps-48-48.png"}],"visual":{"textColor":"dark","topbg":""}}}
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