关于mysql

Posted 2022-12-05 ythunder

mysql 忘记密码重置

1. 停止 MySQL 服务

$ cd /usr/local/mysql/bin/
$ mysql.server stop

2.进入安全模式

$ cd /usr/local/mysql/bin/
$ sudo ./mysqld_safe --skip-grant-tables

3.新开一个终端，进入 MySQL

输入mysql命令直接进入

$ cd /usr/local/mysql/bin/
$ mysql
> use mysql
> flush privileges;
> set password for 'root'@'localhost'='***'

修改完成。

4.重启

cd /usr/local/mysql/bin/
mysql.server start

mysql 安装 MYSQL-python

正常情况

sudo pip install MYSQL-python

出错情况

Collecting MySQL-python
  Using cached MySQL-python-1.2.5.zip
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/d1/1lnf846x6p119488dvhnqj740000gn/T/pip-build-b16vZo/MySQL-python/setup.py", line 17, in <module>
        metadata, options = get_config()
      File "setup_posix.py", line 53, in get_config
        libraries = [ dequote(i[2:]) for i in libs if i.startswith(compiler_flag("l")) ]
      File "setup_posix.py", line 8, in dequote
        if s[0] in "\\"'" and s[0] == s[-1]:
    IndexError: string index out of range

谷歌上有

export PATH=$PATH:/usr/local/mysql/bin/

据说可以解决，但我这边一直解决不了

最终解决方法：

1.卸载安装的mysql

$ find . -name "*mysql*"
$ 删除那些文件

2.重新安装brew

$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

3.再装MySQL

$ brew install mysql

4.装x-code

$ xcode-select --install

5.success

$ pip install MySQL-python

一些常用命令

1. 查看sqlserver的端口号

mysql> show global variables like 'port';

2.查看SQL的执行计划

explain 查询语句;