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MySQL ('root'@'%') does not exist 的问题 - 爬虫/数据库 - 清泛IT社区，为创新赋能！
MySQL ('root'@'%') does not exist的问题：
在使用mysql时出现问题： The user specified as a definer ('root'@'%') does not exist。
一般是由于root用户对全局host无访问权限。因此只要给root用户添加一个访问权限即可。
解决办法：
登陆mysql ，...
二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...是分成不同的Block，然后对各个Block进行纠错编码，对于如何分组，我们可以查看QR Code Spec的第33页到44页的Table-13到Table-22的定义表。注意最后两列：
Number of Error Code Correction Blocks ：需要分多少个块。
Error Correction Code Per Blo...
How do I create a user with the same privileges as root in MySQL/MariaDB? [closed]
How do I create a user with the same privileges as root in MySQL/MariaDB?.
1 Answer
1...
淘宝网采用什么技术架构来实现网站高负载的 - 更多技术 - 清泛网 - 专注C/C...
...淘宝目前的一些底层技术框架以及自己的一些感触来说说如何构建一个可 伸缩，高性能，高可用性的分布式互联网应用。时间过得很快，来淘宝已经两个月了，在这两个月的时间里，自己也感受颇深。下面就结合淘宝目前的一...
Error installing mysql2: Failed to build gem native extension
I am having some problems when trying to install mysql2 gem for Rails. When I try to install it by running bundle install or gem install mysql2 it gives me the following error:
...
Export and Import all MySQL databases at one time
I want to keep a backup of all my MySQL databases. I have more than 100 MySQL databases. I want to export all of them at the same time and again import all of them into my MySQL server at one time. How can I do that?
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How to create a database from shell command?
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cat filename.sql | mysql -u username -p # type mysql password when asked for it
Where filename.sql holds all the sql to create your database. Or...
echo "create database `database-name`" | mysql -u username -p
If you really only want to cr...
淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...余度。
大量使用缓存的最大问题就是数据一致性问题。如何保证底层数据的变化在尽可能短的时间内体现给最终用户呢？这一定是一个系统化的工程，尤其对于分层较多的系统来说。
图9 缓存控制体系
图9向我们展示了数据...
How do I import an SQL file using the command line in MySQL?
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Try:
mysql -u username -p database_name < file.sql
Check MySQL Options.
Note-1: It is better to use the full path of the SQL file file.sql.
Note-2: Use -R and --triggers to keep the routines and triggers of original databas...
How do I find out my MySQL URL, host, port and username?
I need to find my MySQL username. When I open the MySQL command line client, it only asks me for my password. I don't remember my username. And for connectivity with JDBC, I need the URL, host and port number. Where do I find all of these?
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