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关于关键词 的检测结果,共 18287
vivo互联网技术 | 2021-01-25 10:23:30 | 阅读(90) | 评论(0)
本文描述了在一次压测过程中,由于Index Merge优化导致的死锁,详细描述了死锁产生的原因以及解决方案,并顺便介绍了Mysql索引结构及加锁机制。通过本文,大家可以掌握死锁分析的基本理论和一般方法,为工作中快速解决实际出现的死锁提供思路。【阅读全文】
unix_5359 | 2021-01-20 15:43:52 | 阅读(60) | 评论(0)
Choose the best answer.You have installed the 8 build of MySQL Shell.mysqlsh --uri root@localhost:3306 -- util check-for-server-upgradeA) It documents any problems with your 5.7 tables to make them ready to upgrade to 8.C) It fixes any problems with your 5.7 tables to make them rea...【阅读全文】
unix_5359 | 2021-01-20 14:57:32 | 阅读(70) | 评论(0)
Mysql 8.0 OCP认证考试原题题库整理(CUUG内部资料)-第11题Choose the best answer.You have upgraded the MySQL binaries from 5.7.28 to 8.0.18 by using an in-place upgrade.Examine the message sequence generated during the first start of MySQL 8.0.18:Which step or set of steps will r...【阅读全文】
unix_5359 | 2021-01-18 10:32:23 | 阅读(80) | 评论(0)
Choose the best answer.mysqlsh> dba.createCluster( 'cluster1' , {memberWeight:35})mysqlsh> mycluster.addInstance ( 'ic@ic2' , {memberWeight:25})Now examine this configuration setting, which is the same on all nodes:Which statement is true if primary node ic1 fails?B) Node ic3 b...【阅读全文】
unix_5359 | 2021-01-18 10:07:04 | 阅读(80) | 评论(0)
Choose two.A) It creates logical backups.C) It can perform hot or warm backups.E) It supports restoring to a remote MySQL system.【阅读全文】
pygmalion666 | 2021-01-07 17:54:04 | 阅读(280) | 评论(0)
执行Mysql的explain extended的输出会比单纯的explain多一列filtered,它指返回结果的行占需要读到的行(rows列的值)的百分比。按说filtered是个非常有用的值,因为对于join操作,前一个表的结果集大小直接影响了循环的次数。但是我的环境下测试的结果却是,filtered的值一直是100%,也就是说失去了意义。【阅读全文】
【Mysql/postgreSQL】 MySQL数据文件目录迁移
jackson198574 | 2021-01-05 12:16:16 | 阅读(150) | 评论(0)
MySQL数据文件目录迁移【阅读全文】
linux言叙 | 2020-12-27 19:14:16 | 阅读(120) | 评论(0)
1、备份db1数据库中所有表(包括表结构和数据,不包括创建db1数据库的语句)mysqldump -h192.168.1.10 -uroot -p db1 > xxx.sql2、备份db1数据库中所有表(包括表结构和数据,包括创建db1数据库的语句)mysqldump -h192.168.1.10 -uroot -p --databases db1 > xxx.sql3、备份db1数据库中t1、t2、t3表(包...【阅读全文】
【Mysql/postgreSQL】 mysql冷备份
恒行2主管2540437 | 2020-12-18 15:53:38 | 阅读(100) | 评论(0)
mysql冷备份指的是在停掉mysql服务的情景下备份整个data目录,windows下该目录默认情况下位于C:\Program Files\MySQL\MySQL Server 5.0\data, data目录下每个数据库都对应有相应的文件夹,其中系统数据mysql是最重要的,里面包含了所有数据库的字典信息,若是想单独备份某个数据库的话,必须同时也备mysql系统数据库,通常情...【阅读全文】
【C/C++】 MySQL Quota Daemon
xuequansongmo | 2020-12-16 17:09:05 | 阅读(0) | 评论(0)
 <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />   1 . About MySQL Quota Daemon is a lightweight tool for limiting database sizes. As the MySQL server has no support for preventing disk from ge<?xml:namespace prefix = st1 ns = "Tencent" />tting...【阅读全文】
starb6 | 2020-12-10 14:19:04 | 阅读(170) | 评论(0)
sh-3.2# mysql -u root -psh: mysql: command not found: sh-3.2# cd ~  //进入根目录sh-3.2# pwd/var/rootsh-3.2# ls -a .bash*。//看一看.bash_file文件在不在。不在就建一个。.bash_history.bash_profilesh-3.2# more .bash_profilePATH=$PATH:/usr...【阅读全文】
可怜的猪头 | 2020-12-09 17:52:57 | 阅读(600) | 评论(0)
cmake升级 hash -rgcc升级mysqld与mysqld_save的区别下载的源码包 mysql-8.0.16.tar.gz编译安装mysql-8.0.16 遇到的问题和解决方案:一:CMake 3.4.3 or higher is required. You are running version 2.8.12.2要求安装cmake3这个包需要安装扩展包,cmake3 在扩展库里面yum install epel-release -yyum inst...【阅读全文】
unix_5359 | 2020-12-09 17:05:59 | 阅读(190) | 评论(0)
4、Choose two.Examine these commands that you executed and the results:WHERE USERHOST = 'fwuser@localhost' ;    -------------mysql> SELECT RULE FROM INFORMATION_SCHEMA.MYSQL_FIREWALL_WHITELISTmysql> CALL mysql.sp_set_firewall_mode('fwuser@localhost' , 'RESET') ;...【阅读全文】
unix_5359 | 2020-12-09 16:41:30 | 阅读(220) | 评论(0)
Examine this statement, which executes successfully:You want to improve the performance of this query:FROM world.cityWhich change enables the query to succeed while accessing fewer rows?B) ALTER TABLE world.city ADD SPATIAL INDEX (Name) ;D) ALTER TABLE world.city ADD FULLTEXT I...【阅读全文】
【Python/Ruby】 group by mysql出现错误
wwm | 2020-11-25 10:46:08 | 阅读(160) | 评论(0)
mysql出现which is not functionally dependent on columns in GROUP BY clause报错解决方案方案一:修改SQL语句,每个字段前加上any_value    SELECT any_value(id) AS id,any_value(uid),any_value(rid) FROM sys_user_role WHERE (rid = '1259293401992036353') GROUP BY uid;...【阅读全文】
【Python/Ruby】 group by mysql出现错误
wwm | 2020-11-25 10:45:34 | 阅读(160) | 评论(0)
mysql出现which is not functionally dependent on columns in GROUP BY clause报错解决方案方案一:修改SQL语句,每个字段前加上any_value    SELECT any_value(id) AS id,any_value(uid),any_value(rid) FROM sys_user_role WHERE (rid = '1259293401992036353') GROUP BY uid;...【阅读全文】
wwm | 2020-11-25 10:44:35 | 阅读(200) | 评论(0)
方案一:修改SQL语句,每个字段前加上any_value    SELECT any_value(id) AS id,any_value(uid),any_value(rid) FROM sys_user_role WHERE (rid = '1259293401992036353') GROUP BY uid;【阅读全文】
wwm | 2020-11-25 10:44:07 | 阅读(210) | 评论(0)
方案一:修改SQL语句,每个字段前加上any_value    SELECT any_value(id) AS id,any_value(uid),any_value(rid) FROM sys_user_role WHERE (rid = '1259293401992036353') GROUP BY uid;【阅读全文】
普通人刘大 | 2020-09-16 20:25:47 | 阅读(310) | 评论(0)
mysql怎样查看用户
mysql> SELECT DISTINCT CONCAT('User: ''',user,'''@''',host,''';') AS query FROM mysql.user;
详情查看这篇文章《MySQL查看所有用户 - MySQL 系列教程》
https://kalasearch.cn/community/tutorials/how-to-list-all-users-in-mysql/?
【阅读全文】
赵一八笔记 | 2020-08-20 11:33:07 | 阅读(520) | 评论(0)
阿里云数据库是基于MySQL吗?都有什么版本呢?阿里云数据库是基于MySQL吗?阿里云云数据库有多个版本可选,如云数据库RDS MySQL版、云数据库RDS SQL Server版及云数据库Redis版等,MySQL数据库可以选择阿里云RDS云数据库MySQL版。阿里云数据库是基于MySQL吗?阿里云数据库有多个版本,有基于MySQL的云数据库...【阅读全文】