mysql数据库的相关内容

问答 2020-06-01 来自：开发者社区

php初级入门问题关于mysql_query,数据库报错

" 现在想试试php 写个小系统，在登录模块遇到这样一个问题 $sql="select password from userinfo where username='andy'"; $pass=mysql_query($sql); $url="/protal"; if(pass = $_POST["userpassword"]) { echo ""; ...

问答 2020-06-01 来自：开发者社区

docker中mysql启动容器闪退,数据库报错

" 问题原因： 1、Docker上可能远程密码丢失了，这个时候还可以启动容器或者重启容器，就是提示 ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) 然后吧，我按照这个博客，https://blog.csdn.net/Yg854879464/article/details...

问答 2020-06-01 来自：开发者社区

Mac上的mysql数据库root密码忘记。,数据库报错

"怎么样才能找回密码，或者直接更改？ "

问答 2020-06-01 来自：开发者社区

MySql语句注入问题,数据库报错

在验证用户名和密码时，如果是用了prepadStatment就可以完全防止sql语句注入了吗？那么有其他办法可以攻破数据验证这一关吗？

问答 2020-06-01 来自：开发者社区

MySQL 不同隔离级别加锁情况,数据库报错

" 对于MySQL 各种隔离级别的加锁情况分析的博客很多但对 read uncommitted 这个级别的加锁情况分析总是一笔带过。甚至美团的博客简述 read uncommitted 隔离级别不加任何锁。但我分析下来确实是加锁的，比如t1,t2两个事务，t1 更新一条记录，t2 更新同一条记录，两者事务都没有提交的情况下，t1事务加的是 X 行级排他锁，t2事务会阻塞，但是对于加...

问答 2020-06-01 来自：开发者社区

mysql服务无法启动的问题,数据库报错

" @Tuesday 你好，想跟你请教个问题：老师您好，我下载的最新版本的Mysql 也出现了同样不能正常启动服务的问题，找到您给出的解决办法很好用，{http://www.oschina.net/question/1244397_2138435#answers}能够正常启动服务了但是有些小问题想再请教您，如下：请问： 1，无需再my.default.ini中配置吗，只需...

问答 2020-06-01 来自：开发者社区

月经贴：mysql设置密码,数据库报错

" yum install mysql mysql-server 然后怎么设置初始密码？" ![image.png](https://ucc.alicdn.com/pic/developer-ecology/def7a25bf003497cb046955ef0bd862b.png)

问答 2020-06-01 来自：开发者社区

" 新买了一个mac然后安装mysql但是是下载的mysql的dmg包装的，装好之后在系统偏好设置中也出现了mysql服务而且也能在这里正常启动，但是root用户总是密码错误无法登陆上去，也尝试了使用mysqladmin修改root密码结果提示mysql:command no found之类的，下来在回到usr/local下去查看文件目录的时候发现出现了两个mysql目录，而且里面内容也一样，.....

问答 2020-06-01 来自：开发者社区

原来是utf8的字符集，如何批量更改mysql表中字段的字符集为utf8mb4？,数据库报错

"在mint18上sudo apt-get install mysql-server      然后默认安装的5.7版本，很多教程说5.7版本会在/root/目录下有个隐藏文件 .mysql_secret     然而我切刀root目录并没有找到，求教初始的root密码从哪里找？     附带：...

问答 2020-06-01 来自：开发者社区

mysql忘记密码，如何重置密码,数据库报错

"   1.使用mysqladmin修改mysql密码  C:\>mysqladmin -udbuser -p password newpass  Enter password: oldpass  当然用此命令的前提是你把mysql加入了环境变量，如果没有加入环境变量的话那只能在命令行下cd到 mysqladmin所在的目录下与此那个次命令了！ &nb...

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